Wanderlust World Wanderlust World Planning to boat on Illinois waters with an out-of-state registration? You have a 90-day grace period. A vessel registered in another state may operate in Illinois for up to 90 consecutive days without Illinois registration.
After 90 days, you face a choice: register the boat in Illinois or remove it from the state. The clock starts on the first day the vessel enters Illinois waters—consecutive days, not cumulative across the year. There's no "reset" by briefly leaving and returning.
Illinois registration is handled through the Department of Natural Resources (IDNR). You'll need: proof of ownership (title or bill of sale), the out-of-state registration, a completed application, and payment (fees vary by length and propulsion type). Once registered, you'll receive Illinois registration numbers and a decal.
Exceptions: documented vessels (U.S. Coast Guard documented) follow federal rules, not state registration. Non-motorized craft (kayaks, canoes, paddleboards) generally don't require registration in Illinois.
Bottom line: Enjoy your summer on Lake Michigan or the Chain O'Lakes, but mark your calendar—Day 91 means compliance or departure.