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Last verified: 4 September 2026. Every statute below was checked against the state legislature’s own text or an equivalent primary source. This page is general information, not legal advice.
Quick answer
Laser jammers are legal under federal law and banned in 11 states plus the District of Columbia: California, Colorado, Illinois, Iowa, Minnesota, Oklahoma, South Carolina, Tennessee, Texas, Utah and Virginia. They are legal, or have no specific statute, in the other 39 states. There is no FCC prohibition on laser jammers, because police lidar is infrared light rather than a radio wave and falls outside FCC jurisdiction entirely. Radar jammers, by contrast, are federally illegal everywhere.
Key facts at a glance
- Laser jammers are explicitly illegal in 11 US states and the District of Columbia.
- Laser jammers are legal under federal law. Radar jammers are not.
- The FCC defines a radio wave as an electromagnetic wave below 3,000 GHz (47 CFR § 2.1). Police lidar runs at roughly 904 nm, or about 332,000 GHz — roughly one hundred times above the ceiling. That single number is why the FCC has no jurisdiction over lidar jammers.
- Only two US jurisdictions ban radar detectors in passenger cars: Virginia and Washington DC.
- In Virginia, one statute — Va. Code § 46.2-1079 — bans both radar detectors and laser jammers. Maximum fine $250, and no demerit points.
- The stiffest jammer penalty is South Carolina: a misdemeanor with a fine of up to $1,000 (S.C. Code § 56-5-3870).
- The most severe classification is Colorado: a class 2 misdemeanor traffic offense carrying 10 to 90 days imprisonment and/or a $150–$300 fine, plus court-ordered destruction of the device.
- Federal rule 49 CFR § 392.71 bans radar detectors in commercial motor vehicles of 10,001 lbs or more in interstate commerce. Adopted 21 December 1993 (58 FR 67375).
- That federal CMV rule also covers laser detectors, because 49 CFR § 390.5 defines “radar detector” to include devices detecting “laser beams or any other future speed measurement technology.”
- DoD Instruction 6055.04, paragraph 3.6.f prohibits radar and laser detection devices on all US military installations.
- Illinois is the only ban state that forbids police from using a suspected violation as the sole basis for a stop (625 ILCS 5/12-613(e)).
- No state enacted, repealed or amended a jammer or detector law in 2025 or 2026.
Radar jammer, laser jammer, radar detector: three different things
Almost every bad answer on this topic comes from collapsing three distinct devices into one. They have three different legal statuses.
| Device | What it does | Federal status | Where banned by state |
|---|---|---|---|
| Radar detector | Passively receives police radar. Emits nothing. | Legal (except in commercial vehicles) | Virginia, Washington DC |
| Radar jammer | Transmits radio energy to defeat police radar. | Illegal — 47 U.S.C. §§ 301, 302a(b), 333 | Illegal everywhere |
| Laser jammer | Emits infrared light to defeat police lidar. | Legal | 11 states + Washington DC |
Why there is no federal ban on laser jammers
The FCC’s authority runs to radio communications. Its own rules, at 47 CFR § 2.1, define radio waves as “electromagnetic waves of frequencies arbitrarily lower than 3,000 GHz, propagated in space without artificial guide.”
Police lidar operates at roughly 904 nanometres. Converted to frequency, that is about 332,000 GHz — more than a hundred times higher than the top of the FCC’s own definition. Infrared light is therefore not a radio wave in any regulatory sense, and neither Part 15 equipment rules nor the anti-interference provision at 47 U.S.C. § 333 reach a lidar jammer.
Police radar is a different story. K band sits near 24 GHz and Ka band near 34 GHz, both comfortably inside FCC jurisdiction. The FCC’s jammer enforcement page states that federal law “prohibits the operation, marketing, or sale of any type of jamming equipment that interferes with authorized radio communications, including cellular and Personal Communication Services (PCS), police radar, and Global Positioning Systems (GPS).” That page names police radar. It does not mention laser or lidar anywhere — which is exactly what the jurisdictional line above would predict.
What about the FDA?
The FDA does regulate laser products, under 21 CFR § 1040.10, for radiation safety. The rule covers products manufactured after 1 August 1976 emitting between 180 nm and 1,000,000 nm, so an infrared laser diode is within scope.
Two things follow, and both are usually reported wrong. First, § 1040.10 applies to lasers — devices working by controlled stimulated emission. A jammer head built from high-power infrared LEDs works by spontaneous emission and is not a laser product under Part 1040 at all. Second, and more importantly: Part 1040 is a product-safety and labelling standard. It does not ban laser jammers, was never intended to, and has no bearing on whether you may use one.
States where laser jammers are illegal
| State | Statute | Does the text say “laser”? | Penalty |
|---|---|---|---|
| California | Cal. Veh. Code § 28150 | Yes — “radar, laser, or any other electronic device” | Infraction. Misdemeanor if you possess four or more devices. Bans use, purchase, possession, manufacture and sale. |
| Colorado | C.R.S. § 42-4-1415 | Yes — “active or passive… radar or laser” | Class 2 misdemeanor traffic offense: 10–90 days and/or $150–$300. Device seized and destroyed by court order. |
| Illinois | 625 ILCS 5/12-613 | Yes — “microwaves or lasers” | Petty offense: $50 minimum first, $100 minimum after. Device seized. |
| Iowa | Iowa Code § 321.232 | Yes — “radar or laser” | Scheduled fine of $135. Device subject to seizure and forfeiture. |
| Minnesota | Minn. Stat. § 169.14, subd. 12 | Technology-neutral — “in any manner with a speed-measuring device” | Petty misdemeanor, max fine $300. |
| Oklahoma | 47 O.S. § 11-808 | Yes — “radar speed meters or laser speed meters” | No penalty in the section itself; the Title 47 general penalty (§ 17-101) applies: $5–$500 or up to 10 days on a first conviction. |
| South Carolina | S.C. Code § 56-5-3870 | Yes — “radar, laser, or any other electronic device” | Misdemeanor, fine up to $1,000 — the highest fine of any ban state. |
| Tennessee | T.C.A. § 39-16-610 | Yes — “active or passive… radar or laser” | Class C misdemeanor to possess or sell; Class B misdemeanor to actually use one. Sits in the criminal code, not the traffic code. |
| Texas | Tex. Transp. Code § 547.616 | Yes — “a radar or laser device” | Class C misdemeanor. Effective 1 September 2011. Covers using, installing, purchasing and selling. |
| Utah | Utah Code § 41-6a-609 | Yes — “the radar or any laser” | Infraction. Affirmative defense if the device was inoperative at the time of citation. |
| Virginia | Va. Code § 46.2-1079 | Yes — “passive or active… radar, laser, or other device” | Traffic infraction, max $250 (via § 46.2-113). No demerit points. Same statute bans radar detectors. |
| Washington DC | 18 DCMR § 736 | No — the text says “radar” only. See caveat below. | $50 collateral, per the Metropolitan Police Department’s Superior Court schedule. |
The Washington DC caveat
DC’s rule, 18 DCMR § 736, is titled “Radar Detectors and Jammers” and reads: “No person shall, in the District of Columbia, sell or offer for sale, or use or have in his possession in a motor vehicle, any device designed to detect or counteract police radar.” The same language was quoted verbatim by the DC Court of Appeals in Smith v. District of Columbia (1981).
The word throughout is radar. The regulation dates to 1981 and predates police lidar enforcement by roughly a decade. Whether it has ever been read to reach a lidar jammer is genuinely unsettled, and we could not resolve it — DC’s own regulation databases were not reachable when we checked. Treat DC as a ban jurisdiction in practice, but understand that the text on its face addresses radar. Radar detectors in DC are unambiguously prohibited; the $50 ticket line item confirms the rule is actively enforced. Vehicles and equipment of the US Armed Forces are exempt.
Four errors that almost every other list repeats
We checked each ban statute individually rather than copying an existing list. Four mistakes turned up often enough to be worth naming.
1. Nebraska is listed as a ban state. It should not be.
Nebraska’s statute is Neb. Rev. Stat. § 60-6,275, and it prohibits operating or possessing “any radar transmission device” while driving — a Class IIIA misdemeanor. The text is limited to radar transmission devices. There is no mention of laser, and no cross-referenced definition that broadens it. Nebraska is a grey area at most, not a confirmed laser jammer ban.
2. Iowa is left off. It belongs on the list.
Iowa Code § 321.232, on the Iowa legislature’s own site, prohibits any device “active or passive” used to “interfere with, disrupt, or scramble the radar or laser” of a speed-measuring device. Sale, operation and possession are all covered, and the scheduled fine is $135. At least one jammer vendor’s 2026 guide lists Iowa as a permitted state. It is not.
3. The Minnesota citation is wrong nearly everywhere.
Page after page cites “Minn. Stat. § 169.14, subd. 13.” The jammer prohibition is at subdivision 12. Subdivision 13 is now Minnesota’s speed-safety-camera penalty provision — a $40 fine, or $80 if you are 20 mph or more over. Citing subd. 13 in 2026 points the reader at an entirely different law.
4. The Texas section number gets transposed.
The jammer statute is § 547.616. Section 547.615 is “Recording Devices,” an unrelated provision about vehicle event data recorders.
Where laser jammers are legal
No laser jammer statute exists in the remaining 39 states: Alabama, Alaska, Arizona, Arkansas, Connecticut, Delaware, Florida, Georgia, Hawaii, Idaho, Indiana, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oregon, Pennsylvania, Rhode Island, South Dakota, Vermont, Washington, West Virginia, Wisconsin and Wyoming.
An honest note on confidence: we verified all 12 prohibitions individually against primary sources. We did not run a separate primary-source statutory search in each of the 39 remaining states. That list rests on the absence of any such statute surfacing in searching, plus agreement between specialist compilations. Treat it as high confidence, not as individually certified.
Two traps in the “passive device” language
License plate covers are a separate offence, not evidence of a jammer ban. Nearly every state prohibits a plate coating or cover that distorts visibility. Texas does it at Tex. Transp. Code § 504.945(a)(7), which reaches any material that “distorts angular visibility or detectability” — a fine up to $300, rising to $600 on a second offence. California does it at Veh. Code § 5201. These catch anti-lidar sprays and reflective covers, but they exist in states with no jammer law at all and prove nothing about jammer legality.
The opposite error is more expensive. Colorado, Iowa, Tennessee and Virginia all reach devices “active or passive,” and California reaches anything “designed for, or is capable of” interfering. In those five jurisdictions, a laser-absorbing coating or reflective plate cover is plausibly caught by the jammer statute itself — with its far heavier penalties — not merely the plate law. People buy non-electronic countermeasures believing they sidestep the ban. In those states, the statutory text does not obviously support that belief.
Windshield mounting laws are not detector bans
California and Minnesota appear on lists of states with “radar detector restrictions.” Neither bans radar detectors. Both have general windshield obstruction laws.
- California, Veh. Code § 26708. Prohibits any object placed on the windshield, with narrow exceptions for a portable navigation unit inside a seven-inch square in the far lower corner or a five-inch square in the near lower corner. The section never mentions radar detectors — which means a windshield-mounted detector has no exception to sit in, and is technically an obstruction violation. Detectors themselves are perfectly legal in California.
- Minnesota, Minn. Stat. § 169.71, subd. 1. Lists what may be suspended between driver and windshield: visors, mirrors, safety-monitoring equipment near the mirror, navigation systems at the bottom of the windshield, toll transponders. Radar detectors are not listed. Again, an equipment rule, not a ban.
In both states the practical answer is the same: mount on the dash, not the glass.
Commercial vehicles: a stricter federal rule
49 CFR § 392.71 is short: “No driver shall use a radar detector in a commercial motor vehicle, or operate a commercial motor vehicle that is equipped with or contains any radar detector,” and no carrier may require or permit a driver to violate it. Adopted 21 December 1993 (58 FR 67375).
A “commercial motor vehicle” under 49 CFR § 390.5 is one used in interstate commerce with a gross weight or rating of 10,001 lbs or more, or carrying more than 8 passengers for compensation, more than 15 not for compensation, or placarded hazardous materials.
The detail almost nobody reports: § 390.5 defines “radar detector” as any device detecting “radio microwaves, laser beams or any other future speed measurement technology” used by enforcement. A laser detector is prohibited in a commercial vehicle by federal rule, despite the section’s title saying radar. The only carve-out is a device transported outside the driver’s compartment and completely inaccessible, inoperable and imperceptible to the driver while driving — both conditions, not either.
Does § 392.71 reach laser jammers? On the text, no. Both the rule and the definition address devices that detect speed-measurement emissions. Jamming is not detection, and neither section mentions jammers, interference or scrambling. We found no FMCSA guidance extending the rule either way, so treat this as a reading of the text rather than a settled agency position. Note also that many states adopt the federal rules for intrastate commercial vehicles, sometimes at a different weight threshold.
Military installations
DoD Instruction 6055.04, paragraph 3.6.f, provides that “using radar or laser detection devices that detect the presence of speed recording instruments or transmit simulated erroneous speeds will be prohibited on installations.”
Two points. The instruction says “radar or laser,” so lidar detectors are covered as well. And the phrase “transmit simulated erroneous speeds” describes jamming, not detection — on its face, DoDI 6055.04 prohibits laser jammers on DoD installations too. That is the one federal instrument we found that plausibly reaches lidar jammers directly. We located no DoD interpretive guidance, so this is a reading of the text. There is no radar detector provision in 32 CFR Part 634; the DoD Instruction is the operative authority.
National parks
The claim that radar detectors are banned in national parks is not supported by any National Park Service regulation we could find. The actual mechanism is 36 CFR § 4.2: unless a park regulation addresses the matter, traffic within a park area is governed by state law, and that state law is adopted as part of the federal regulations. So in a national park unit inside Virginia, the Virginia detector ban applies — as federal law. In a park in Arizona, it does not.
Recent and pending legislation
- New York A6858 (2025–2026 session) would prohibit operating a vehicle equipped with a radar or laser detector, with a rebuttable presumption of use where the device is found connected to power in operable condition. It sat in the Assembly Transportation Committee as of 7 January 2026, and has been reintroduced repeatedly since 2009 without passing.
- Virginia HB 180 (2024) would have repealed the Commonwealth’s detector ban. It was left in the Transportation Committee on 13 February 2024 and did not advance. No successor bill has been filed. Virginia’s ban stands.
- Minnesota looks like it changed, but did not. The jammer provision has been at subd. 12 since at least 2021; speed-safety-camera provisions now occupy subd. 13. The renumbering is an artifact, not a substantive change.
Frequently asked questions
Are laser jammers illegal under federal law?
No. Police lidar is infrared light at about 904 nm, roughly 332,000 GHz, which is far above the 3,000 GHz ceiling that defines a radio wave in 47 CFR § 2.1. The Communications Act and FCC Part 15 rules do not reach it. Radar jammers are federally illegal because police radar is squarely within FCC jurisdiction.
Which states ban laser jammers?
California, Colorado, Illinois, Iowa, Minnesota, Oklahoma, South Carolina, Tennessee, Texas, Utah and Virginia, plus the District of Columbia — 11 states and DC.
Are radar detectors illegal in the same states?
No, and this is the most common confusion. Only Virginia and Washington DC ban radar detectors for passenger cars. The other nine jammer-ban states permit detectors. In Virginia and DC the same provision happens to cover both devices.
What is the penalty for using a laser jammer?
It varies widely. Illinois starts at a $50 petty offense fine; Iowa is a $135 scheduled fine; South Carolina reaches $1,000; Colorado is a class 2 misdemeanor traffic offense with 10 to 90 days of possible jail time and mandatory destruction of the device. Tennessee makes actual use a class B misdemeanor under the criminal code rather than the traffic code.
Can police detect a laser jammer?
An officer using lidar sees the effect directly: the gun returns an error or fails to acquire a reading rather than displaying a speed. That is why jammer statutes in several states criminalise the interference itself rather than requiring proof of a device. Radar detector detectors are a separate technology used in Virginia and DC to find detectors, not jammers.
Is a radar detector legal in a semi truck?
No. 49 CFR § 392.71 prohibits radar detectors in commercial motor vehicles of 10,001 lbs or more in interstate commerce, in all 50 states, and the definition in § 390.5 extends the prohibition to laser detectors as well. The carrier is liable too — it may not require or permit a driver to violate the rule.
Are laser jammers legal in Florida, Texas or New York?
Florida and New York have no laser jammer statute, so they are legal there. Texas bans them under Tex. Transp. Code § 547.616, a class C misdemeanor covering use, installation, purchase and sale. A New York bill to ban detectors and jammers is pending but has not passed.
Does a laser jammer work against radar?
No. A laser jammer emits infrared light and affects lidar only. It does nothing against K or Ka band radar. Defeating radar requires a radar jammer, which is federally illegal in every state. This is why jammer owners typically still run a radar detector alongside.
Is a laser jammer legal on a military base?
DoD Instruction 6055.04 paragraph 3.6.f prohibits devices that detect speed recording instruments or “transmit simulated erroneous speeds” on installations. The second phrase describes jamming, so on the text the answer is no — regardless of the surrounding state’s law.
Sources and method
Every prohibition in the table above was read in the state legislature’s own published text, or on Justia or Public.Law where the legislature’s site was not reachable. Federal rules were read on eCFR. Penalties were taken from the statute itself where stated, and from the state’s general penalty provision where the statute is silent — those cases are marked in the table.
Three points where we could not reach certainty, stated plainly rather than papered over:
- The current text of 18 DCMR § 736 could not be retrieved from a DC government source; it was verified through a law review quotation and a 1981 DC Court of Appeals opinion. Whether it reaches lidar is unresolved.
- Oklahoma’s exact penalty tier is derived from the structure of 47 O.S. § 17-101, because § 11-808 states no penalty of its own.
- The effective date of 49 CFR § 392.71 is widely given as 19 January 1994. We could confirm only the publication date, 21 December 1993, so that is what we cite.
Primary sources: 47 CFR § 2.1 · FCC Jammer Enforcement · 21 CFR § 1040.10 · 49 CFR § 392.71 · 49 CFR § 390.5 · 36 CFR § 4.2 · DoDI 6055.04 · Va. Code § 46.2-1079 · Iowa Code § 321.232 · Minn. Stat. § 169.14 · Tex. Transp. Code § 547.616