Best Alton (IL) Hotels With 18+ Check-In (Updated July 2025)

Welcome to Alton, Illinois, a charming river town with a rich history and vibrant culture, just waiting to be discovered by adventurous young travelers like you. Tucked away in the heart of the Midwest, Alton offers a unique blend of natural beauty, historical landmarks, and modern attractions that cater to a wide range of interests. Whether you're a history buff intrigued by Alton's storied past, an outdoor enthusiast longing to explore the stunning landscapes, or a foodie eager to taste the local cuisine, there's something here for everyone. So pack your bags and get ready to embark on an unforgettable journey to Alton, Illinois.

Below is a list of hotels and motels in Alton that allow reservations for guests under 21, including those aged 18, 19, and 20. From cheap options to more adult-focused accommodations, there's a variety of places to rent that fit your needs and preferences!

Please note that hotel policies regarding the minimum check-in age in Alton can change at any time. While we aim to keep our information updated, we recommend confirming the minimum age requirement with the hotel or motel before making a reservation.