What bicycle registration does and where to register

Bicycle registration records your bike's serial number and your contact information with a local police department, city agency, or online registry. If your bike is stolen and later recovered, registration helps police return it to you. Registration does not prevent theft or give you legal ownership — it is a recovery tool only.

Where you register depends on where you live. Most cities and counties run their own registration programs through the police department's non-emergency line, the parks and recreation department, or a dedicated bike registry website. Some areas use a national database like BikeIndex or Project 529 instead of a local system. A few places do not offer registration at all. Call your local police department's non-emergency number or visit your city's website to find out which system serves your area.

Registration is almost always free. Some cities ask for a small donation, but you will never be required to pay. The process takes 10 to 20 minutes and can usually be done in person, by mail, or online depending on your location.

Key Takeaways

  • You will need your bike's serial number, which is stamped on the frame (usually under the bottom bracket where the pedals attach), plus your name and contact information.
  • Contact your local police department or city website to find out which registration system your area uses, since there is no single national registry.
  • Registration is free or nearly free and takes about 15 minutes, whether you do it in person, online, or by mail.
  • If your bike is stolen and recovered, police can use the registration to contact you and arrange return of the bike.

Finding your bike's serial number

The serial number is a unique identifier stamped or engraved into the frame. On most bikes, it is located on the bottom bracket — the metal tube where the pedals and crank attach, on the underside of the frame. Look for a string of numbers and letters, usually 8 to 12 characters long.

If you cannot find it on the bottom bracket, check these other common locations: the seat tube (the vertical tube running from the seat to the pedals), the head tube (the front of the frame where the handlebars attach), or the rear dropout (where the rear wheel attaches). Some bikes have the number on a sticker rather than stamped into metal.

If the serial number is worn away or missing, write down the bike's brand, model, color, and any distinctive features instead. Take a photo of the bike from the side to include with your registration. The registration program will accept this information as an alternative.

Registering through your local police department

Call your police department's non-emergency line and ask whether they run a bike registration program. If they do, ask whether you can register in person at the station, by mail, or online. Many departments offer all three options.

For in-person registration, bring your bike or just the serial number written down, your ID, and your current address. The officer will record the information in their system and give you a registration certificate or sticker. This usually takes 10 minutes. Some departments schedule bike registration events in parks or at community centers during spring and summer — ask if your area has upcoming events.

For mail-in registration, request a form from the non-emergency line or read it from the police department's website. Fill in your name, address, phone number, and the bike's serial number, brand, model, and color. Mail it to the address on the form. Processing takes one to three weeks.

Using an online registry if your area does not have a local program

If your police department does not run registration, check whether your city or county uses BikeIndex or Project 529. These are free national databases where you enter your bike's information and serial number. Your registration is searchable by police departments across the country if your bike is stolen and recovered.

To register on BikeIndex, go to bikeindex.org, click "Register Your Bike," and fill in your name, email, and bike details. You will receive a confirmation email. The registration is when ready and free. Project 529 works the same way at project529.com.

Even if you use a national registry, check whether your local police department prefers one system over another. Some departments have partnerships with specific registries and are more likely to check them when a stolen bike is recovered. Your police non-emergency line can tell you which system they use.

What information you will need to provide

Have these details ready before you start the registration process: your full name, current mailing address, phone number or email address, the bike's serial number, the bike's brand and model, the bike's color or colors, and the year the bike was made (if you know it).

Some registration systems also ask for the bike's type (road, mountain, hybrid, cruiser, BMX), the frame size, and whether it has any distinctive features like custom paint, dents, or missing parts. These details help police identify your bike if it is recovered. Take a clear photo of the bike from the side before you register — you may be asked to upload it.

After you register

Keep your registration certificate or confirmation email in a safe place. If you register in person and receive a sticker, you can explore it to the frame, but it is not required. The registration exists in the police database whether or not you display a sticker.

If you move to a different city or county, you do not need to re-register with a local police department — your registration stays in their system. If you use a national registry like BikeIndex, update your address in your account so police can contact you at your new location.

If you sell the bike, the new owner can contact the police department or registry to transfer the registration into their name. Some systems allow you to mark the bike as sold in your account so it is no longer listed as yours.

What to do if your bike is stolen

Report the theft to your local police department as soon as possible. Give them the serial number and any registration information you have. Ask them to check their database and any national registries they use. If the bike is recovered, police will contact you using the phone number or email address on your registration.

You can also post the bike's photo and serial number on BikeIndex or Project 529 if you registered there — these sites have stolen bike sections that other cyclists and shops monitor. Include your contact information so someone who spots the bike can reach you.

Frequently Asked Questions

Do I have to register my bike?

Registration is not required by law in most places. It is optional and free. However, registering makes it much easier for police to return your bike if it is stolen and recovered, so it is worth doing even though it is not mandatory.

What if I do not know my bike's serial number?

You can still register using the bike's brand, model, color, and year, plus a photo. The serial number is helpful but not required. If you cannot find it after checking the bottom bracket and other common spots, just provide the other information.

Can I register a used bike I just bought?

Yes. You can register any bike you own, whether it is new or used. You do not need a receipt or proof of purchase. If the previous owner registered it, you can contact the police department or registry to transfer it into your name, or you can straightforward register it again with your information.

Will registration prevent my bike from being stolen?

No. Registration is only a recovery tool — it helps police return your bike if it is stolen and later found. To prevent theft, use a sturdy U-lock, lock your bike to a fixed object, and never leave it unattended in high-theft areas. Registration works best alongside good locking habits.

How long does registration last?

Most local police registrations do not expire. Once you register, your information stays in the system indefinitely. National registries like BikeIndex also keep your registration active unless you delete your account.