The Treaty of Greenville State Park is a historic park located in Ohio, commemorating the Treaty of Greenville signed in 1795 between the United States and several Native American tribes. The treaty marked the end of the Northwest Indian War and ceded vast territories of present-day Ohio, Indiana, Illinois, Michigan, and parts of Wisconsin to the United States. The park serves as a reminder of this significant agreement, offering recreational activities, educational opportunities, and historical exhibits that pay tribute to the Native American tribes and the complex history of the region.

Ohio does not have an annual pass and does not charge entrance fees to state parks.