How to Register a Boat With Illinois Department of Natural Resources

Where to register your boat in Illinois

The Illinois Department of Natural Resources (IDNR) handles all boat registration in the state. You register through their Boat Registration Unit, either by mail or in person at one of their regional offices. Unlike vehicle registration through the Secretary of State, boat registration is a separate process managed entirely by IDNR.

You can mail your registration packet to the IDNR Boat Registration Unit in Springfield, or visit an IDNR regional office in person. The mailing address and office locations are on the IDNR website. Processing by mail typically takes two to four weeks from the date IDNR receives your packet.

Key Takeaways

Illinois requires registration for any motorized boat or sailboat over 16 feet, and registration is handled by IDNR, not the Secretary of State.
You need the boat's hull identification number (HIN), proof of ownership, and a completed process form to register.
Registration costs vary by boat length and type, and your certificate is valid for three years from the date of issue.
You can register by mail or in person at an IDNR regional office, and mail processing takes two to four weeks.
Renewing your registration requires the same documents and process as initial registration, and you should start the process before your current certificate expires.

What boats need to be registered in Illinois

Any boat with a motor must be registered in Illinois, regardless of size. This includes boats with outboard motors, inboard motors, or jet drives. Sailboats over 16 feet in length also require registration. Non-motorized boats under 16 feet, such as canoes, kayaks, and rowboats, do not need to be registered.

If you own a boat that was previously registered in another state, you must register it in Illinois within 30 days of bringing it into the state. IDNR considers a boat "in the state" once it is in the water or being transported for use in Illinois waters.

Documents and information you need to register

Before you contact IDNR, gather the boat's hull identification number (HIN), which is a unique 12-character code stamped into the hull. The HIN is usually located on the starboard (right) side of the boat near the stern, or on the transom. If you cannot locate it, IDNR staff can help you find it during an in-person visit.

You also need proof of ownership. This can be a bill of sale, a previous registration certificate from another state, a manufacturer's statement of origin, or a title document if your state issued one. If the boat is financed, bring the lien holder's name and address. Complete the IDNR Boat Registration process form, which is available on the IDNR website as a PDF you can print and fill out by hand, or you can request a paper copy by mail.

If you are registering a boat owned by a business or organization rather than an individual, bring documentation showing the legal name and address of the entity, such as articles of incorporation or a business license.

Registration fees and certificate validity

Illinois boat registration fees depend on the boat's length and whether it has a motor. Motorized boats are charged by length in five-foot increments, starting at a base fee for boats under 16 feet and increasing for each size category. Sailboats are charged a flat rate regardless of length. Non-resident boats (those registered to someone outside Illinois) pay a higher fee than resident boats.

Your registration certificate is valid for three years from the date IDNR issues it. You do not renew on a calendar-year basis; renewal is due three years after your certificate date. IDNR will not send you a renewal notice, so mark your certificate's expiration date on your calendar. Operating a boat with an expired registration can result in a fine.

How to register by mail

Print the IDNR Boat Registration process form from the IDNR website, fill it out completely, and sign it. Include a copy of your proof of ownership and a check or money order for the registration fee made payable to the State of Illinois. Do not send cash. Mail the packet to the IDNR Boat Registration Unit address listed on the form.

IDNR will process your registration and mail your certificate back to you. This process takes two to four weeks. If you need your registration sooner, visit an IDNR regional office in person; same-day registration is often available at walk-in offices, though wait times vary by location and time of day.

How to register in person at an IDNR office

Locate the IDNR regional office nearest you on the IDNR website. Bring the completed process form, your proof of ownership, and your payment method (check, money order, or cash, depending on the office). Some offices accept credit or debit cards; call ahead to confirm what payment methods your office takes.

Bring the boat's HIN or the boat itself if it is small enough to transport. If you cannot locate the HIN on the boat, IDNR staff can inspect the boat to find it. Processing at the office is usually when ready, and you will receive your registration certificate on the spot. If the office is busy, you may wait 30 minutes to an hour.

Renewing your boat registration

To renew, follow the same process as initial registration: complete the process form, provide proof of ownership (your current registration certificate counts as proof), and submit payment. You do not need to provide the HIN again if you are renewing the same boat, but IDNR may ask for it to verify the boat's identity in their system.

Start the renewal process at least four weeks before your certificate expires if you are mailing it, or visit an office in person closer to the expiration date. Operating with an expired registration is illegal, even if you have submitted a renewal process and are waiting for the new certificate to arrive.

Frequently Asked Questions

What if I buy a used boat that was registered in another state?

You have 30 days to register it in Illinois. Bring the out-of-state registration certificate or bill of sale as proof of ownership. IDNR will issue a new Illinois certificate, and the three-year validity period starts from the date of your Illinois registration, not the date of the original out-of-state registration.

Do I need to register a boat I only use in Illinois once a year?

Yes. Any motorized boat or sailboat over 16 feet used in Illinois waters must be registered, regardless of how often you use it. The registration is valid for three years, so you register once and do not need to renew until the certificate expires.

Can I register a boat online?

No. Illinois does not offer online boat registration. You must register by mail or in person at an IDNR office. Mail registration takes two to four weeks, while in-person registration is usually same-day.

What happens if my boat registration expires?

Operating a boat with an expired registration is a violation and can result in a fine. If your certificate has expired, renew it when ready by mail or in person. Do not operate the boat until the new certificate arrives.

Where do I display the registration certificate on my boat?

Illinois law requires the registration number to be displayed on the hull in characters at least three inches tall. The certificate itself should be kept on the boat and shown to law enforcement if requested. Check the IDNR website for specific placement rules, as they vary slightly by boat type.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.