When the mercury rises, water parks offer a fun way to cool down. Among the bigger water parks in Illinois are Raging Waves, which is located near Chicago, Raging Rivers in Grafton (it would appear that there is a lot of "raging" going on in the state), and Hurricane Harbor, the water park that is located at Six Flags Great America and is included with admission to the theme park. Illinois has some indoor water parks as well, which offer year-round wet fun.
Parks are listed alphabetically.
Small municipal outdoor park includes a lazy river and water slides.
CoCo Key Indoor Water Park at Clock Tower Resort
Indoor water park open to registered hotel guests and limited availability for general public.
Small indoor water park open to registered hotel guests and the general public on certain days. Also offers an indoor amusement park
Good-sized indoor water park resort open to registered hotel guests and to the general public via group sales.
Knight's Action Park
Includes Splash Kingdom water park with seven water slides, a wave pool, and a lazy river. Amusement park includes mini-golf, go-karts, a Ferris wheel, and an arcade.
Small municipal outdoor water park with 150 ft. waterslide, interactive water play equipment, and sand play area.
Large outdoor water park with many water slides and a huge wave pool.
Small municipal outdoor water park with zero-depth pool, body slides, tube slides, lazy river, and beach volleyball.
Small municipal outdoor water park with lazy river, slides, diving well, and activity pool.
Small municipal outdoor water park with pools, water slides, sand volleyball, and other activities.
Medium-sized outdoor water park with a wave pool, lazy river, water slides, and attractions for young children.
Raging Waves Waterpark
Huge outdoor water park with many slides including a bowl ride, a family raft ride, and more.
Six Flags Hurricane Harbor at Six Flags Great America
Huge outdoor water park requires admission to Six Flags plus an additional fee for the water park.
Small municipal outdoor water park with slides, pool, kids' area.
Small municipal outdoor water park with a lazy river, pool, and water slides.
Small railroad-themed outdoor water park.
Splash Valley Aquatic Park
Small municipal outdoor water park with body slides, tube slides, lazy river, and zero-depth pool.