The Alfred B. Maclay Gardens State Park is a historic site turned state park in Tallahassee, Florida. It is best noted for being the highest rated state park in Florida.

The Alfred B. Maclay Gardens State Park is named after Alfred Barmore Maclay. Maclay originally owned the area as a part of his property. He named the estate Killearn, after the place where his great-grandfather was born in Scotland. He cultivated the lot as a botanical garden with his wife Louise Fleischman. It was opened to the public in 1946.

Also known and listed as a historic district under the name Killearn Plantation Archaeological and Historic District, the site has 18 historic buildings, 4 structures, and 4 objects. It also offers 3 amazing lakes and several plant life.