The Hillsdale State Park is a state park and recreation area in Paola, Kansas. It is located in Eastern Kansas.

Opened in 1994, the Hillsdale State Park features the Hillsdale Lake, which is also one of the newest reservoirs in the state. The reservoir was created as a part of a plan for flood control for the Missouri and Osage River basins.

The Hillsdale State Park is famous for its outdoor recreation. Picnicking, camping, RVing, hiking bicycling, fishing, and boating are the most commonly done at the park, although they also have an equestrian area that offers 32 miles of trails open to horseback riders. Swimming is also frequently enjoyed at the site. A number of safety regulations apply at the beach areas, though.