Is it legal to listen to a police scanner in the US?

Yes. Federal law permits receiving unencrypted radio transmissions, and no state bans scanner listening outright. Restrictions apply to using a scanner in a vehicle in some states, and to using one while committing a crime everywhere.

Can I use a police scanner app in my car?

In most states, yes. A small number of states restrict mobile scanner use in a vehicle, sometimes with an exemption for licensed amateur radio operators. Check your own state law before listening while driving.

Is it illegal to record police scanner audio?

Recording unencrypted radio you are lawfully receiving is generally permitted. Republishing or broadcasting it can raise separate issues, and federal law prohibits divulging certain intercepted communications for personal gain.

Can police tell if I am listening?

No. A scanner is a receiver. It emits nothing that identifies you and there is no way for an agency to detect a passive listener.

Is It Legal to Listen to a Police Scanner?

Updated July 29, 2026 · 6 min read

Short answer: in the United States, listening to unencrypted police radio is legal. The long answer has three parts worth understanding, because the exceptions are narrow but real.

The federal baseline

The Communications Act of 1934 established a principle that still governs scanning: radio signals broadcast over the public airwaves may be received by anyone with equipment capable of receiving them. Congress did not carve out public-safety frequencies.

The Electronic Communications Privacy Act (ECPA) later drew the line more precisely. It prohibits intercepting communications that are not readily accessible to the general public — encrypted traffic, cellular calls, and similar private channels. Traffic broadcast in the clear over a conventional or trunked public-safety system is, by definition, readily accessible. Receiving it is not interception in the legal sense.

Two federal limits do apply:

Encrypted traffic is off limits. Decrypting a channel an agency has scrambled is a federal offence, and no consumer scanner or app can do it anyway.
Divulging for gain. Federal law prohibits intercepting a communication and divulging it for your own benefit or another's. Listening privately is not covered; selling information you heard is a different matter.

Where states add restrictions

No state bans scanner listening outright. A minority regulate two narrower situations.

Scanners in vehicles. A handful of states restrict possessing or using a mobile scanner in a car, historically to stop drivers from evading enforcement. These statutes were written for physical scanners and vary in whether courts have read them to reach phones. Several exempt licensed amateur radio operators, journalists, or first responders.

Using a scanner in a crime. Every state that addresses scanners makes it a separate, usually more serious, offence to use one in the commission of a crime or to evade apprehension. This is the provision that actually gets charged. It is not about listening; it is about what you did while listening.

Because these statutes differ and get amended, check your own state's current code rather than a summary — including this one. A state attorney general's office or a local amateur radio club is a more reliable source than a forum post from a decade ago.

What about recording?

Recording radio traffic you are lawfully receiving is generally permitted. Wiretapping laws, including the two-party consent rules that trip people up with phone calls, apply to private communications — not to a broadcast anyone with a receiver can hear.

Publishing is where care is warranted. Scanner audio routinely contains names, addresses, medical details, and unconfirmed reports about people who have not been charged with anything. Broadcasting that can create liability that has nothing to do with radio law: defamation, privacy torts, or interference with an investigation. Many feed operators voluntarily mute channels during sensitive incidents for exactly this reason.

Can anyone tell you are listening?

No. A scanner is a receiver — it takes in radio energy and produces sound. It transmits nothing. There is no signal for an agency to detect, no registration, and no log. The same is true of a scanner app, which is simply playing an audio stream from a server.

What this means in practice

For almost everyone, the practical rules are short:

Listening to unencrypted public-safety radio at home is legal everywhere in the US.
Check your state before listening in a vehicle.
Never use a scanner to interfere with, evade, or assist in a crime — that is the provision with real teeth.
Think hard before republishing audio, especially about identifiable people.

Why so much traffic has gone quiet

The bigger change over the last decade has not been legal but technical. Agencies have moved to digital trunked systems, and many now encrypt some or all channels. That has removed a great deal of traffic from public listening regardless of what the law permits — a shift covered in why police channels are encrypted.

If you are new to scanning, the guide to ten-codes and radio codes will make what you hear far easier to follow.

This article is general information, not legal advice. Scanner statutes vary by state and change; consult a lawyer or your state's current code for your situation.