Parks in Greater St. Louis
Parks in Greater St. Louis are administered by a variety of state, county, and municipal authorities. The region also is home to the Jefferson National Expansion Memorial, site of the Gateway Arch, the only National Memorial in the state of Missouri. Among the largest municipal parks is Forest Park, which is 1,293 acres (5.2 km2) and is located in the city of St. Louis, although both Greensfelder Park and Creve Coeur Park in St. Louis County are larger, at 1,646 and 2,114 acres (6.7 and 8.6 km2) respectively. St. Louis County is also the location of two large state parks, Babler State Park with 3.8 square miles (9.8 km2) and Castlewood State Park with 2.8 square miles (7.3 km2). The largest state park in the region is Meramec State Park, located near Sullivan, Missouri, with 10.8 square miles (28 km2) of parkland.
Parks in the city of St. Louis 
The city of St. Louis owns and maintains more than one hundred parks, ranging in size from nearly 1,300 acres (5.3 km2) of Forest Park to less than 1-acre (4,000 m2). Several parks in the city are owned or maintained by other entities, such as Tower Grove Park, which is maintained by a Board of Commissioners but remains city property.
Parks in St. Louis County 
St. Louis County owns and maintains more than forty parks, including playgrounds and nature preserves. It also operates several recreation centers, the Museum of Transportation, and the Affton Community Center. In addition to parks owned by St. Louis County, several municipalities in the county also own and maintain their own park systems.
State parks 
|Babler State Park||2,441|
|Castlewood State Park||1,818|
|Hawn State Park||4,954|
|Jones-Confluence Point State Park||1,121|
|Meramec State Park||6,896|
|Robertsville State Park||1,224|
|Route 66 State Park||419|
|St. Francois State Park||2,734|
|St. Joe State Park||8,243|
|Washington State Park||2,148|