Tracking someone without their knowledge or consent is illegal in most situations in the United States, and the penalties are serious. Whether it involves a GPS device on a car, software on a phone, or digital location monitoring, unauthorized tracking can result in felony charges in many states.
The legal picture is not one-size-fits-all. The type of tracking, the relationship between the people involved, and the state where it happens all determine which laws apply and how severe the consequences are.
This guide breaks down every major tracking scenario: GPS devices, phone tracking, spousal tracking, employer monitoring, and what the courts have said about privacy rights in 2026.
Is It Illegal to Track Someone
Tracking someone without their consent is illegal in most circumstances under both federal and state law in the United States. The specific law that applies depends on the tracking method, but unauthorized location monitoring generally violates stalking statutes, wiretapping laws, or both.
Federal law provides the first layer of protection. The Interstate Stalking Statute (18 U.S.C. 2261A) prohibits using electronic monitoring to place a person in reasonable fear for their safety. The Electronic Communications Privacy Act (18 U.S.C. 2510 through 2522) restricts the interception of electronic communications, which courts have applied to certain forms of digital location tracking.
All 50 states have anti-stalking and surveillance laws that independently prohibit tracking without consent. Many states have also passed specific GPS tracking statutes that go beyond general stalking law to address modern tracking technology directly.
The common thread across federal and state law is consent. Tracking with a person’s knowledge and agreement is generally lawful. Tracking covertly, without the person knowing, is the conduct that creates criminal and civil liability.
Quick Facts:
- Federal anti-stalking statute: 18 U.S.C. 2261A
- Electronic Communications Privacy Act: 18 U.S.C. 2510-2522
- All 50 states: have anti-stalking laws that cover electronic tracking
- Key variable: consent, tracking method, and relationship between parties
- Criminal penalties: range from misdemeanor to felony depending on state and circumstances
Is It Illegal to Track Someone Without Their Permission
Tracking someone without their permission is illegal in most circumstances across the United States. The absence of consent is the primary factor that converts lawful observation into criminal surveillance.
The legal analysis starts with whether the person being tracked has a reasonable expectation of privacy in the information being collected. The Supreme Court addressed this directly in United States v. Jones (565 U.S. 400, 2012), holding that physically attaching a GPS device to a vehicle without a warrant violated the Fourth Amendment when done by government actors. For private individuals, state stalking and surveillance statutes apply rather than the Fourth Amendment.
Most state GPS tracking statutes prohibit placing or using a tracking device on another person’s vehicle, property, or person without consent. California Penal Code 637.7 makes it illegal to use an electronic tracking device to determine the location or movement of a person without their consent. Violation is a misdemeanor with up to one year in jail and a fine up to $1,000.
Illinois 720 ILCS 5/14-3.5 similarly prohibits the use of a tracking device to determine the location of an electronic device without consent, creating misdemeanor to felony exposure depending on circumstances.
| State | GPS Tracking Statute | Without Consent | Penalty |
|---|---|---|---|
| California | Penal Code 637.7 | Illegal | Misdemeanor, up to 1 year, $1,000 fine |
| Texas | Penal Code 16.06 | Illegal | Class A misdemeanor, up to 1 year |
| Illinois | 720 ILCS 5/14-3.5 | Illegal | Misdemeanor to felony |
| Florida | Statute 934.425 | Illegal | First-degree misdemeanor |
| New York | Penal Law 120.45 (stalking) | Illegal | Class B misdemeanor to felony |
Is It Legal to Track Someone
Tracking someone is legal in a narrow set of circumstances, primarily when the person being tracked has given clear consent, when a parent is monitoring a minor child, or when an employer is monitoring company-owned devices and vehicles under a disclosed policy.
The legal pathway to tracking someone almost always runs through consent. A person who agrees to share their location through a phone app, who installs a tracking app on their own device with knowledge that someone can view it, or who signs an employment agreement acknowledging vehicle or device monitoring has given the consent that makes tracking lawful.
Law enforcement tracking is governed by separate Fourth Amendment principles. Police generally need a warrant to track a person’s location over an extended period, as the Supreme Court held in Carpenter v. United States (585 U.S. 296, 2018). That case involved cell phone location data, and the Court found that obtaining historical location records without a warrant violated the Fourth Amendment.
Private investigators can legally conduct surveillance in public spaces where a person has no reasonable expectation of privacy. Observing someone at a public location or following them in public areas is generally lawful. Installing a GPS device on their vehicle is not.
Circumstances where tracking is generally legal:
- Tracking with the person’s explicit knowledge and consent
- Parent tracking a minor child’s location through disclosed parental control apps
- Employer tracking company-owned vehicles or devices under a disclosed policy
- Law enforcement with a valid warrant
- Licensed PI observing someone in public spaces
Can You Legally Track Someone’s Location
You can legally track someone’s location only with their consent or under specific legal authority such as a court order or warrant. Private tracking of another person’s location without consent violates federal or state law in virtually all US jurisdictions.
The technical ease of location tracking through modern technology has created a significant gap between what is technically possible and what is legally permitted. Apps, AirTags, GPS devices, and phone-based location sharing are easy to deploy. But ease of deployment does not create legal authorization.
Courts have consistently ruled that covert tracking of another person’s location, even in public spaces over time, can violate privacy laws when the tracking is systematic and sustained. In United States v. Jones, the Supreme Court unanimously held that a GPS device installed on a vehicle constituted a “search” requiring a warrant when done by government actors. For private actors, state statutes create equivalent prohibitions.
Think of location tracking like wiretapping. Just because you can technically tap a phone call doesn’t mean you can legally do so. The same principle applies to GPS tracking: capability and legality are entirely separate questions.
Key Takeaway: Tracking someone’s location is legal only with consent or specific legal authority. The technical ability to track does not create legal permission. Both federal law and state statutes independently prohibit covert location tracking, with criminal penalties in most jurisdictions.
Is It Illegal to Put a GPS Tracker on Someone’s Car
Placing a GPS tracker on someone else’s car without their consent is illegal in most US states under specific GPS tracking statutes, stalking laws, or both. Several states have passed laws specifically targeting covert tracking devices on vehicles.
Texas Penal Code Section 16.06 is one of the clearest examples. It prohibits installing, hiding, or otherwise placing an electronic tracking device on a motor vehicle owned or leased by another person without consent. Violation is a Class A misdemeanor, carrying up to one year in county jail and a fine up to $4,000.
California Penal Code 637.7 makes it unlawful to use an electronic tracking device to determine the location or movement of a person without their consent. The statute specifically includes vehicles, and violation is a misdemeanor on the first offense, a felony on subsequent offenses.
One critical nuance: placing a tracker on a vehicle you own is legal even if someone else regularly uses it. A parent who owns the family car can track it. An employer who owns company vehicles can track them. The prohibition targets placing devices on vehicles belonging to someone else.
| State | Vehicle GPS Statute | Penalty |
|---|---|---|
| California | Penal Code 637.7 | Misdemeanor; felony for repeat |
| Texas | Penal Code 16.06 | Class A misdemeanor, up to 1 year |
| Florida | Statute 934.425 | First-degree misdemeanor |
| Washington | RCW 9.73.260 | Gross misdemeanor to felony |
| Michigan | MCL 750.539l | 2-year felony |
Is It Illegal to Track Someone’s Phone
Tracking someone’s phone without their knowledge or consent is illegal under the Electronic Communications Privacy Act (18 U.S.C. 2511) and state wiretapping or surveillance laws in all 50 states. Accessing another person’s phone location data without authorization is a serious federal and state offense.
The ECPA makes it illegal to intentionally intercept, use, or disclose electronic communications without authorization. Courts have applied this framework to unauthorized access to phone location data, including real-time GPS location pulled from someone’s phone without consent.
Beyond ECPA, the Computer Fraud and Abuse Act (18 U.S.C. 1030) prohibits unauthorized access to computer systems. Since smartphones are computers, accessing someone’s phone to install tracking software or access their location data without permission is a federal crime under this statute as well.
State laws add their own prohibitions. Most state wiretapping and electronic surveillance statutes require all-party consent for monitoring electronic communications in their jurisdiction. States with all-party consent requirements include California, Florida, Illinois, Maryland, Massachusetts, Michigan, Montana, Nevada, New Hampshire, Oregon, Pennsylvania, and Washington.
Quick Facts:
- Federal statute: ECPA (18 U.S.C. 2511), CFAA (18 U.S.C. 1030)
- All-party consent states (12 states): require consent from everyone being monitored
- One-party consent states: only one party needs to consent, typically the person doing the tracking
- Accessing phone without authorization: federal felony under CFAA
- Phone tracking with consent (shared family plan, disclosed app): generally legal
Is It Illegal to Install Tracking Software on Someone’s Phone
Installing tracking software on another person’s phone without their knowledge or consent is a federal crime under the Computer Fraud and Abuse Act (18 U.S.C. 1030) and is also illegal under state computer access and surveillance laws in every US state.
Stalkerware, which is software specifically designed to covertly monitor a person’s phone without their knowledge, is one of the most serious forms of illegal tracking. The Federal Trade Commission has taken enforcement action against stalkerware companies, and multiple states have prosecuted individuals for installing monitoring apps on partners’ phones.
The CFAA’s prohibition applies because installing software on another person’s device without authorization constitutes unauthorized access to a protected computer. The same conduct can also violate the Stored Communications Act (18 U.S.C. 2701), which prohibits unauthorized access to stored electronic communications.
State laws provide additional criminal exposure. California Penal Code 502 (unauthorized computer access) and similar statutes in every state create independent criminal liability for installing tracking software on another person’s device.
What tracking software installation triggers:
- Federal CFAA violation (18 U.S.C. 1030): up to 5 years federal prison
- Federal Stored Communications Act (18 U.S.C. 2701): civil and criminal penalties
- State computer access statutes: penalties vary, felony charges common
- FTC enforcement: civil actions against stalkerware companies
- Domestic violence context: enhanced penalties in many states for tracking intimate partners
Key Takeaway: Installing tracking software on another person’s phone without consent is a federal felony under the Computer Fraud and Abuse Act, and state laws add independent criminal liability. No relationship status, including marriage or parenthood for adult children, creates an exception to this prohibition.
Is It Legal to Track Your Spouse
Tracking a spouse without their consent is illegal in most US states regardless of the marriage relationship. Marriage does not grant either spouse the legal right to secretly monitor the other’s location.
The most common misconception in this area is that spouses have a legal right to surveil each other because they share property or finances. Courts have consistently rejected this argument. The marriage relationship does not eliminate either spouse’s privacy rights under stalking, surveillance, or GPS tracking statutes.
California courts, Texas courts, and courts in most other states have upheld prosecutions of spouses who placed GPS trackers on their partner’s vehicle, accessed location data from the partner’s phone, or installed tracking apps without consent. These convictions survived arguments that the couple’s shared ownership of the vehicle or phone plan changed the analysis.
One narrow exception exists in some states: if a spouse owns the vehicle solely in their name, they may have broader rights to track it as their own property. But placing a tracker on a vehicle titled in the other spouse’s name or in both names is treated differently in most jurisdictions.
| Scenario | Legal Status | Notes |
|---|---|---|
| GPS on vehicle you solely own | Generally legal | Applies even if spouse uses it |
| GPS on spouse’s vehicle | Illegal in most states | Most state GPS statutes apply |
| Accessing spouse’s phone location without consent | Illegal | ECPA, CFAA, state law |
| Shared family location sharing app (with consent) | Legal | Consent is the key |
| Divorce proceedings, using tracked data | Legally complex | Evidence may be inadmissible if obtained illegally |
Is It Legal to Track Your Child’s Phone
Parents have the legal right to track their minor child’s phone in all 50 US states, and this is explicitly recognized as a lawful parental monitoring activity under both federal and state law. The parental exception to tracking law covers children under the age of 18.
Federal law recognizes parental authority over minor children’s electronic device use. The ECPA and CFAA include provisions that recognize parental consent as a substitute for the minor’s consent. A parent who installs a location-sharing or monitoring app on a phone they provide to their minor child is exercising lawful parental authority.
The key requirements for lawful parental tracking are that the child must be a minor (under 18), the parent must have legal custody or guardianship, and the tracking must be for genuine parental oversight purposes rather than harassment.
The parental exception ends at age 18. Once a child becomes an adult, parents have no greater legal right to track their location than any other person. Tracking an adult child without their consent is subject to the same laws as tracking any other adult.
Quick Facts:
- Minor child tracking (under 18): legal for parents and legal guardians in all 50 states
- Parental monitoring apps: lawful when parent provides the device
- Age 18 and over: no parental exception, same laws apply as to any adult
- Non-custodial parent: may have more limited rights, depends on custody agreement
- Child tracking during school hours: legal, school tracking policies may also apply
Is It Legal for Employers to Track Employees
Employers can legally track employees’ location and activity in most circumstances when monitoring involves company-owned devices or vehicles and when employees have been informed of the monitoring through a disclosed policy. Covert tracking of employees on their personal devices or in private spaces is generally illegal.
The legal framework for employer monitoring varies by state. Federal law does not specifically prohibit employer monitoring of company equipment. However, state privacy laws create important limits. California Labor Code 1198.5 and California’s Constitutional right to privacy, for example, impose stronger restrictions on employer monitoring than most other states.
All-party consent states, including California, Illinois, and Florida, require that employees be informed before their communications or locations are monitored. A disclosed monitoring policy that employees sign and acknowledge satisfies the consent requirement in these states.
Personal device tracking is where employer rights end in most states. Employers cannot require employees to install tracking apps on their personal phones without clear consent, and several states have passed laws specifically protecting employee personal devices from employer access.
Legal employee monitoring scenarios:
- Company vehicle GPS: legal with disclosed policy in all states
- Company phone location tracking: legal with disclosed policy
- Personal vehicle tracking: illegal in most states, even during work hours
- Personal phone tracking: illegal without explicit employee consent
- Remote work monitoring software: legal on company-owned computers, consent required for personal
Key Takeaway: Employers can legally track employees using company-owned devices and vehicles when monitoring policies are disclosed. Tracking personal devices or vehicles, covert monitoring without disclosure, and monitoring in all-party consent states without proper notification all create legal liability for employers.
Stalking vs Tracking Law
The legal distinction between stalking and tracking is important but not always clear-cut. Stalking law covers a pattern of conduct that causes fear. Tracking law, including specific GPS and surveillance statutes, covers the method of surveillance itself, even without a pattern or demonstrated fear.
Stalking statutes require a course of conduct (typically two or more acts) that places a person in reasonable fear. Adding GPS tracking to that course of conduct aggravates the stalking charge in most states. California Penal Code 646.9, Texas Penal Code 42.072, and most other state stalking statutes specifically include electronic monitoring as a qualifying form of stalking conduct.
Specific GPS tracking statutes, by contrast, do not require a course of conduct or demonstrated fear. A single placement of a GPS tracker on someone’s car without consent violates California Penal Code 637.7 and Texas Penal Code 16.06 regardless of whether it creates fear or is part of a pattern.
The practical consequence is that a person who places one GPS tracker on a vehicle can be charged under a specific tracking statute, while a person who does the same thing combined with repeated contact, following, or threats faces both the tracking charge and a more serious stalking charge.
| Legal Category | Requires Pattern | Requires Fear | Penalty Level |
|---|---|---|---|
| Specific GPS tracking statute | No, single act sufficient | No | Misdemeanor typically |
| Stalking with electronic tracking | Yes, course of conduct | Yes, reasonable fear | Misdemeanor to felony |
| Federal stalking (18 U.S.C. 2261A) | Yes, two or more acts | Yes, places in fear | Federal felony |
| Computer Fraud (tracking software) | No, single act | No | Federal felony |
Can Police Track Your Phone Without a Warrant
Police generally cannot track your phone’s location data without a warrant, following the Supreme Court’s landmark ruling in Carpenter v. United States (585 U.S. 296, 2018). That case held that obtaining historical cell site location information (CSLI) without a warrant violates the Fourth Amendment.
The Carpenter ruling was a significant expansion of digital privacy rights. Previously, the government argued that cell phone location data held by third parties (phone companies) did not require a warrant under the third-party doctrine. The Supreme Court rejected that argument and held that the “detailed, encyclopedic, effortlessly compiled” nature of cell phone location data brings it within Fourth Amendment protection.
Real-time GPS tracking of a phone by law enforcement also requires a warrant in most jurisdictions following United States v. Jones and Carpenter. Emergency exceptions exist for situations involving imminent danger to life, but routine law enforcement tracking of phone location without a warrant is constitutionally prohibited.
State constitutions may provide even stronger protections than the federal Fourth Amendment. Several state courts have interpreted their own constitutions to require warrants for shorter durations of location tracking than the federal standard.
Quick Facts:
- Historical CSLI: warrant required per Carpenter v. United States (2018)
- Real-time GPS tracking: warrant required in most circumstances
- Emergency exception: exists for imminent danger to life, does not require warrant
- State constitutions: may provide stronger protections than federal Fourth Amendment
- Private tracking: Fourth Amendment does not apply, state statutes govern instead
What Is the Penalty for Illegally Tracking Someone
The penalty for illegally tracking someone ranges from a misdemeanor with up to one year in jail for a first-offense state GPS tracking violation to a federal felony with up to five years in federal prison for tracking software installation under the Computer Fraud and Abuse Act. Stalking charges involving tracking can carry higher penalties.
The penalty level depends on the tracking method, the state, whether the conduct was part of a stalking pattern, and whether federal law applies:
| Offense Type | Governing Law | Typical Penalty |
|---|---|---|
| GPS device on someone’s car | State statute (CA 637.7, TX 16.06) | Misdemeanor, up to 1 year, $1,000-$4,000 fine |
| GPS stalking (pattern of conduct) | State stalking statute | Misdemeanor to felony, 1 to 5 years |
| Federal stalking with tracking | 18 U.S.C. 2261A | Federal felony, up to 5 years |
| Tracking software installation | CFAA (18 U.S.C. 1030) | Federal felony, up to 5 years |
| Accessing phone location data | ECPA (18 U.S.C. 2511) | Federal felony, up to 5 years |
| Michigan vehicle GPS (specific statute) | MCL 750.539l | 2-year felony |
| Aggravated stalking with prior conviction | State enhanced statute | Up to 10 years in many states |
Civil liability runs parallel to criminal penalties. Victims of illegal tracking can sue for damages under state privacy torts and federal statutes. The Stored Communications Act (18 U.S.C. 2701) provides for actual damages, statutory damages of at least $1,000 per violation, and attorney’s fees.
Is Tracking Someone’s Location Without Consent a Crime
Tracking someone’s location without their consent is a crime in most US jurisdictions, with criminal liability arising from multiple overlapping federal and state statutes depending on the tracking method used. The answer is almost uniformly yes, with the severity of the crime varying by method and state.
The criminal law framework for unauthorized location tracking operates on three tracks. First, specific GPS tracking statutes in states like California, Texas, Florida, Washington, and Michigan criminalize placing or using tracking devices on another person’s vehicle or property. Second, stalking statutes in all 50 states criminalize electronic surveillance conducted as part of a course of conduct causing fear. Third, federal computer crime statutes apply when tracking involves unauthorized access to phones or computers.
The clearest situation for criminal exposure is a person who places a GPS device on another person’s vehicle without consent. That single act violates specific state statutes in most states without requiring any additional conduct. The person does not need to be following a stalking pattern. The installation alone is the crime.
Digital tracking creates even broader criminal exposure because it implicates federal computer crime statutes with felony-level penalties on top of state law violations.
Criminal tracking scenarios ranked by legal risk:
- Installing stalkerware on another person’s phone: highest risk, federal felony
- Placing GPS tracker on another person’s vehicle: high risk, state felony or misdemeanor
- Accessing another person’s location data on a platform: federal violation, ECPA
- Sustained location monitoring causing fear (stalking pattern): misdemeanor to felony
- Observing someone in public without electronic tools: lowest risk, generally legal
Frequently Asked Questions
Is it illegal to track someone without their knowledge in the US?
Yes, tracking someone without their knowledge is illegal in most circumstances under both federal and state law.
Federal statutes including the ECPA (18 U.S.C. 2511) and the Computer Fraud and Abuse Act (18 U.S.C. 1030) prohibit unauthorized electronic tracking.
State GPS tracking statutes and anti-stalking laws in all 50 states create additional independent criminal liability for covert location monitoring.
Can you legally put a GPS tracker on someone’s car?
No, placing a GPS tracker on another person’s car without their consent is illegal in most US states.
States including California (Penal Code 637.7), Texas (Penal Code 16.06), Florida (Statute 934.425), and Michigan (MCL 750.539l) have specific statutes that criminalize this conduct.
Penalties range from a misdemeanor with up to one year in jail to a two-year felony in Michigan.
Is it legal to track your spouse or partner’s location?
Tracking a spouse without their consent is illegal in most states regardless of the marriage.
Marriage does not eliminate either spouse’s privacy rights under GPS tracking statutes, and courts have upheld prosecutions of spouses who secretly installed trackers.
Tracking through a mutually disclosed app that both parties agreed to is legal; covert monitoring is not.
What is the penalty for illegally tracking someone?
Penalties range from a misdemeanor with up to one year in jail for state GPS tracking violations to a federal felony with up to five years in prison under the Computer Fraud and Abuse Act.
Stalking charges involving electronic tracking can reach 10 or more years in states with aggravated stalking provisions for repeat offenders or when a protective order was violated.
Civil damages are available in addition to criminal penalties, with the Stored Communications Act providing a minimum of $1,000 in statutory damages per violation.
Can police track your phone without a warrant?
No, police generally cannot track your phone location data without a warrant following the Supreme Court’s ruling in Carpenter v. United States (2018).
That decision held that historical cell site location information is protected by the Fourth Amendment and requires a warrant.
Emergency exceptions exist for imminent threats to life, but routine law enforcement location tracking without a warrant is unconstitutional.
Closing
The legal lines around tracking someone are more defined than most people realize. Consent is the deciding factor in almost every scenario, and the absence of it is what converts tracking from lawful monitoring into criminal surveillance under multiple overlapping laws.
Bookmark this guide for reference, whether you’re trying to understand your own tracking rights or protect yourself from being tracked. The law in this area has evolved significantly with the Carpenter ruling in 2018 and continues to develop as technology outpaces legislation heading into 2026.
