Wisconsin GPS Tracking Laws: Is It Legal to Put a Tracker on a Car? (2026)

Wondering whether you can legally put a GPS tracker on a car in Wisconsin? The short answer: only if the car is yours, or you fit one of a handful of narrow exceptions written into the statute. Wisconsin not only criminalizes planting the tracker. It also criminalizes looking at the data the tracker produces.

This guide is part of our GPS Tracking Laws by State series. Below is what Wisconsin law actually says, who is allowed to track a vehicle, what happens with AirTags, and what to do if you find a device on your own car.

Is It Legal to Put a GPS Tracker on a Car in Wisconsin?

No, not unless you own or lease the vehicle or qualify for a statutory exception. Wis. Stat. 940.315 makes it a Class A misdemeanor to place a GPS device, or any device equipped with GPS technology, on a vehicle owned or leased by another person without that person's consent.

The law was created by 2015 Wisconsin Act 45 and has not been amended since. It is one of the more carefully drafted vehicle tracking statutes in the country because it spells out exactly who gets an exception and, just as importantly, who does not.

Tracking your own car is legal. That includes a car you lease. What the statute forbids is putting a tracker on a vehicle that belongs to someone else: a spouse's separately titled car, a partner's car, an ex's car, a coworker's car. Consent from the owner or lessee makes the placement lawful. Suspicion, jealousy, or a custody dispute does not.

Wisconsin's Two-Crime Rule: Placing AND Reading the Data (940.315)

Most state tracking laws stop at the act of placement. Wisconsin goes a step further and creates two separate offenses.

First, under section 940.315(1)(a), it is a crime to place a GPS device (or a device equipped with GPS technology) on a vehicle owned or leased by another person without consent.

Second, under section 940.315(1)(b), it is a separate crime to intentionally obtain information about another person's movement or location that was generated by a device placed in violation of the statute. In plain terms, merely reading the data is its own Class A misdemeanor.

That second prong matters more than people realize. You do not have to be the person who planted the device. If a friend or family member installs a tracker on someone's car and you log into the app to check where that person went, you have committed your own offense. Each violation carries up to 9 months in jail and a $10,000 fine.

Who CAN Legally Track a Vehicle in Wisconsin

Section 940.315 lists specific exceptions. The statute does not apply to:

• Vehicle owners and lessees. You can always track a vehicle you own or lease.
• Employers and business owners. A business may use GPS on vehicles it owns, leases, or assigns to employees. This is among the clearest employer safe harbors in any state tracking law.
• Parents and guardians. A parent or guardian may track a vehicle used by their minor child or ward.
• Lienholders. A lienholder may use GPS in connection with repossessing a vehicle, which is why many buy-here-pay-here dealers and subprime lenders install trackers on financed cars.
• Law enforcement officers acting in their official capacity. Even so, the Fourth Amendment applies: in United States v. Jones (2012), the U.S. Supreme Court held that attaching a GPS device to a suspect's vehicle and monitoring it is a search; the Court did not decide whether that warrantless search could still be reasonable, because it treated the government's argument on that point as forfeited.
• Vehicle manufacturers. Factory telematics systems such as OnStar-style services are exempt.
• Insurance devices. Usage-based insurance trackers used for rating, underwriting, or claims are allowed when installed with the owner's permission.

Notice who is missing from that list: private investigators. Wisconsin has no PI exception. A licensed investigator who plants a tracker on a vehicle the client does not own or lease commits the same Class A misdemeanor as anyone else. If a PI offers to "put a tracker on your spouse's car," that PI is offering to commit a crime in Wisconsin.

Can My Employer Track My Car in Wisconsin?

It depends entirely on whose car it is.

If you drive a vehicle your employer owns, leases, or assigns to you, the answer is yes. The statute expressly permits a business owner to use GPS on vehicles "owned, leased, or assigned" by the business, and the "assigned" language squarely covers fleet and take-home company vehicles. Wisconsin employers do not need your consent to track company vehicles, even during off-duty hours, although many adopt written policies anyway.

Your personal car is a different story. The employer exception does not reach vehicles an employee personally owns or leases. An employer who slips a tracker onto your personal vehicle without your consent commits the misdemeanor like anyone else. Tracking through a phone app you agreed to install raises separate consent questions, but the vehicle tracking statute is about devices placed on vehicles.

For workplace cameras and monitoring more broadly, see our guide to surveillance camera laws.

AirTags and Item Trackers: The Stalking Route (940.32)

Section 940.315 talks about vehicles. So what about an AirTag dropped into a purse, a jacket pocket, or a gym bag?

Wisconsin's stalking statute fills the gap. Wis. Stat. 940.32 defines a stalking "course of conduct" to include, among other acts, "monitoring or recording the activities of the victim" through electronic means, "regardless of where the act occurs." That language covers tracking a person with an AirTag, a Tile, a hidden GPS unit in a bag, or spyware, whether or not a vehicle is ever involved.

Stalking requires a course of conduct (two or more acts) that would cause a reasonable person serious emotional distress or fear of bodily harm. Base-level stalking is a Class I felony. With aggravating factors, such as a prior conviction involving the same victim, a victim under 18, or use of a dangerous weapon, the charge climbs to a Class H or Class F felony.

Federal law adds another layer. The federal stalking statute, 18 U.S.C. 2261A, criminalizes using any electronic communication system or electronic monitoring to stalk someone across state lines or in other federal jurisdiction situations, with penalties starting at up to 5 years in federal prison.

Penalties for Illegal GPS Tracking in Wisconsin

Each act can be charged separately. Someone who plants a tracker and then checks the data has arguably committed at least two distinct misdemeanors, and a sustained pattern of tracking can support a felony stalking charge on top.

Civil Options: Suing Over a Tracker

Wisconsin gives tracking victims civil tools alongside the criminal statutes.

Privacy lawsuit. Wis. Stat. 995.50 creates a right of privacy, including a claim for intrusion upon privacy "in a place that a reasonable person would consider private." Whether GPS tracking of a car driven on public roads fits that definition is arguable and has not been tested in Wisconsin's appellate courts. A tracker that logged visits to your home, a doctor's office, or a place of worship gives a plaintiff the strongest argument. A successful claim can bring an injunction, compensatory damages, and attorney fees.

Harassment injunction. Wis. Stat. 813.125 lets a victim seek a harassment restraining order, and courts routinely treat covert tracking as part of a harassment or domestic abuse pattern. Our guide to Wisconsin restraining order laws walks through the process.

What to Do If You Find a Tracker on Your Car

1. Do not destroy it. The device is evidence, and it may carry fingerprints, a serial number, or account data that identifies who placed it.
2. Photograph it in place before anyone touches it: where it was mounted, how it was attached, the date and time.
3. Call local police. Placing the device is a crime under 940.315, and a pattern of tracking may support a stalking charge under 940.32. Ask for a report number.
4. Think about safety before removing it if you suspect a current or former partner. Removing a tracker tells the person who planted it that you found it. Domestic violence advocates often recommend making a safety plan first.
5. Consider a harassment injunction under 813.125 once you know, or strongly suspect, who is responsible.
6. Get the car swept. A mechanic can check wheel wells, bumpers, the OBD-II port, and the battery compartment for additional devices.

If the tracking is part of a broader pattern of recording or monitoring, our Wisconsin recording laws guide covers the state's rules on audio and video recording.

Sources

• Wis. Stat. 940.315 - Global positioning devices
• 2015 Wisconsin Act 45
• Wis. Stat. 940.32 - Stalking
• Wis. Stat. 995.50 - Right of privacy
• Wis. Stat. 813.125 - Harassment restraining orders and injunctions
• 18 U.S.C. 2261A - Stalking

Disclaimer: This article is for general informational purposes only and is not legal advice. Laws change, and how they apply depends on the facts of your situation. If you are dealing with unwanted tracking, stalking, or a related legal dispute, consult a licensed Wisconsin attorney. If you are in immediate danger, call 911.

More Wisconsin Laws

• Wisconsin Dashcam Laws
• Wisconsin Data Privacy Laws
• Wisconsin Drone Laws
• Wisconsin Employee Monitoring Laws
• Wisconsin Recording Laws
• Wisconsin Restraining Order Laws

Frequently Asked Questions

Can I put a GPS tracker on my spouse's car in Wisconsin?

Not if the car is owned or leased solely by your spouse. Wis. Stat. 940.315 protects vehicles owned or leased by another person, and there is no exception for spouses. If the vehicle is titled in both names, the statute's application is less clear, but planting a tracker during a divorce or custody dispute invites both criminal exposure and serious problems in family court.

Is it illegal to just look at GPS data someone else collected?

Yes. Wisconsin makes it a separate Class A misdemeanor to intentionally obtain information about another person's movement or location generated by an unlawfully placed device. You can be charged even if you never touched the tracker.

Can a private investigator legally place a GPS tracker in Wisconsin?

No. Wisconsin's statute contains no private investigator exception. A PI may only track a vehicle with the consent of its owner or lessee, which usually means the client must own the car being tracked.

Can my parents put a tracker on my car?

If you are a minor, yes. The statute exempts a parent or guardian tracking a vehicle used by their minor child or ward. Once you are 18 and own or lease your own vehicle, the exception no longer applies.

Are AirTags illegal in Wisconsin?

Owning and using an AirTag on your own keys, luggage, or car is legal. Using one to secretly monitor another person can be charged as stalking under Wis. Stat. 940.32, which covers electronic monitoring of a victim regardless of where it occurs. Base stalking is a Class I felony.

Can police track my car with GPS without a warrant?

The Fourth Amendment applies. In United States v. Jones (2012), the U.S. Supreme Court held that attaching a GPS device to a vehicle and monitoring its movements is a Fourth Amendment search, so it is subject to Fourth Amendment limits; Jones itself did not decide whether a warrant was required, because the government forfeited its argument that the search was reasonable. Wisconsin's statute separately exempts officers acting in their official capacity from the state misdemeanor.

Can a car dealer or lender track my financed car?

Yes, within limits. Lienholders may use GPS in connection with repossession, and insurers may install usage-based devices with the owner's permission for rating, underwriting, or claims purposes. Factory telematics from the manufacturer are also exempt.

Has Wisconsin updated its GPS tracking law recently?

No. Section 940.315 was created by 2015 Wisconsin Act 45 and has not been amended since. The stalking statute, harassment injunction process, and federal cyberstalking law fill the gaps for non-vehicle tracking.