Are Radar Detectors Legal? 2023 State-by-State Guide – Automoblog

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Radar detectors are mostly legal in the United States, but there are some exceptions. As for laser jammers, the same is true. Laser jammers are widely considered legal but are subject to a few more restrictions than radar detectors, depending on the state. This guide will look at the radar detector laws for all 50 U.S. states.
Using a radar detector in a privately owned passenger vehicle is legal in every state except Iowa, Virginia, and Washington D.C.
However, there are some gray areas regarding the laws in Virginia and the District of Columbia. According to Virginia law, it’s okay to have a radar detector as long as it’s not accessible to the vehicle’s occupants and there is no power source. If the unit is off and in the trunk, for example, you should be in the clear. According to the Virginian-Pilot, you could face up to a $250 fine for violating the law. Police can also confiscate radar detectors on the spot if they stop you.
Radar detectors are illegal in any commercial vehicle weighing over 10,000 lbs., no matter what state you’re driving in. In commercial vehicles under 10,000 lbs., radar detectors are allowed in all states except for Illinois, Iowa, Minnesota, New Jersey, New York, Virginia, and Washington D.C.
If you are operating an 18-wheeler for the purpose of interstate commerce, radar detectors are absolutely illegal inside the cab, even if the unit is off. The ban on radar detectors, enacted by the Federal Highway Administration in 1994, is meant to discourage such large trucks from speeding.
Laser Jammers are illegal to use in California, Illinois, Colorado, Minnesota, Oklahoma, Nebraska, South Carolina, Texas, Utah, Tennessee, Virginia, and Washington D.C. But since there is no federal law banning them, they can be used in other states.
Laser jammers work by transmitting invisible light sources back to the original police laser gun (or LiDAR gun) to confuse it. These types of laser guns are much more direct and allow officers to pinpoint a single vehicle more effectively. The return signal confuses the laser gun, and as a result, the officer cannot “clock” the driver’s speed.
Radar jammers or scramblers are illegal in all 50 states because they interfere with the broad signal law enforcement uses to target speeding vehicles, but they can even cause problems for airplanes. Federal law (Section 333 of the Communication Act of 1934) describes radar jammers as a “malicious interference.” Even a first offense can result in heavy fines and jail time.
Let’s take a look at radar detection laws by state. Note that federal law prohibits using radar detectors on military bases in all 50 states.
Using radar detectors is legal in private vehicles in Alabama. Laser jammers are also legal.
Radar detectors and laser jammers are legal in Alaska.
There are no limitations for radar detectors in private vehicles in Arizona. Laser jammers are legal too.
Radar detectors and laser jammers are legal in Arkansas.
In California, radar detectors are legal, but the state does have a say about where they are positioned (Minnesota does too). In California, you cannot mount anything to the windshield as it may obstruct the view. If you have a radar detector in California, you must mount it on the dashboard. If you get caught with it on the windshield, you can be ticketed. Laser jammers are also illegal in the Golden State.
Radar detectors are legal in Colorado, but laser jammers are illegal under state law.
Radar detectors and laser jammers are legal in Connecticut.
In Delaware, you can legally use a radar detector or laser jammer in a private vehicle. Note that independent studies in recent years have shown Delaware is among the strictest states when it comes to speeding.
Radar detectors and laser jammers are legal in Florida.
It is legal to have a radar detector or laser jammer in a private vehicle in Georgia.
Radar detectors and laser jammers are permitted in the Aloha State.
You can legally use a radar detector or laser jammer in Idaho.
Radar detectors are legal in Illinois. Laser jammers, however, are not permitted. Likewise, radar detectors are not allowed in any commercial vehicle, even if it’s under 10,000 lbs.
Radar detectors and laser jammers are legal in Indiana.
Things have changed under Chapter 321 of Iowa’s motor vehicles and law of the road (more specifically, this section here). Based on that verbiage, radar detectors and laser jammers are illegal in the Hawkeye State. 
For that long stretch across I-70, you’re in luck. Radar detectors and laser jammers are both legal in Kansas.
Radar detectors and laser jammers are legal in Kentucky.
Radar detectors and laser jammers are both legal in the Pelican State.
Radar detectors and laser jammers are permitted in Maine.
Unlike in the neighboring state of Virginia, radar detectors are legal in private vehicles in Maryland. Laser jammers are also legal in Maryland.
Radar detectors and laser jammers are legal in Massachusetts.
Radar detectors and laser jammers are both legal. However, be aware if you are crossing over to Windsor from Detroit. Radar detectors are not legal in Ontario, and local law enforcement has been known to confiscate them.
Minnesota law is similar to California. You can have a radar detector, but it cannot be mounted to the windshield. If you live in Minnesota, secure it to the dashboard instead to avoid getting a ticket. Keep in mind that laser jammers are illegal under state law. Radar detectors are not allowed in a commercial vehicle, even if it’s under 10,000 lbs.
Radar detectors and laser jammers are legal in Mississippi.
In Missouri, radar detectors and laser jammers are legal.
Radar detectors and laser jammers are legal in Montana.
Radar detectors are legal in Nebraska. Laser jammers are illegal, as are all references to the Colorado Buffaloes (which didn’t change even though the Huskers are in the Ben Ten now).
Radar detectors and laser jammers are legal in Nevada.
New Hampshire permits radar detectors and laser jammers in private vehicles.
Radar detectors and laser jammers are legal in New Jersey. However, radar detectors are not allowed in commercial vehicles in The Garden State, even if they are under 10,000 lbs.
In New Mexico, it is okay to have a radar detector or laser jammer in a private vehicle.
Both radar detectors and laser jammers are legal in New York. However, radar detectors are not allowed in commercial vehicles even if they are under 10,000 lbs.
Radar detectors and laser jammers are legal in the Tar Heel State.
North Dakota allows the use of radar detectors and laser jammers.
Radar detectors and laser jammers are both legal.
Oklahoma permits the use of radar detectors and laser jammers in private vehicles.
Radar detectors and laser jammers are legal in Oregon.
In the Keystone State, it’s okay to use either a radar detector or laser jammer.
Radar detectors and laser jammers are allowed in Rhode Island.
Radar detectors are legal in South Carolina, but laser jammers are illegal.
South Dakota state law permits the use of radar detectors and laser jammers.
Radar detectors are legal in Tennessee, but not laser jammers.
Texas allows radar detectors in private vehicles, but laser jammers are not permitted.
Radar detectors are legal in Utah, although laser jammers are not.
In Vermont, radar detectors and laser jammers are legal.
Radar detectors and laser jammers are illegal in Virginia.
The State of Washington allows radar detectors and laser jammers in private vehicles.
Radar detectors and laser jammers are both legal.
Radar detectors and laser jammers are permitted in The Badger State.
Radar detectors and laser jammers are legal in Wyoming.     
Radar detectors and laser jammers are illegal to use in the District of Columbia.
In most states, it’s legal to have a radar detector or laser jammer in your car, except for Iowa, Virginia, and Washington D.C. Under federal law, radar detectors are illegal in any commercial vehicle over 10,000 lbs. or on any military base.
Radar detectors can help you avoid a speeding ticket, but you don’t have to spend a lot to get a nice, reliable unit. Check out our list of the best radar detectors under $200.

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