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Keystone Park is one of many small parks created by the City's Bureau of Parks and Recreation to meet the increasing recreational demands of post-World War II Chicago. In 1949, the City Council identified and acquired a small property in the Humboldt Park neighborhood for park development. During the following year, the Bureau of Parks and Recreation improved the site with a spray pool, a sand box, and playground equipment.

Following its general policy, the bureau named the park for adjacent Keystone Avenue. The street name refers to Pennsylvania, long known as the "Keystone State," for its location in the geographic center of the thirteen original American colonies. The architectural term "keystone" refers to the central piece in a masonry arch. In 1957, the City transferred Keystone Park to the Chicago Park District, along with more than 250 other properties pursuant to the Chicago Park and City Exchange of Functions Act. The Park District planted a number of trees the following year, and extensively rehabilitated the playground in 1992.

This small playground with sandbox sits on 0.26 acres in the Humboldt Park community, (one block west of Pulaski Road, almost a block north of North Avenue). While there is no structured programming taking place at this location, we invite you to check out our great programs offered nearby at Hermosa Park.