Garfield Square, also known as Garfield Park, is a 3.46-acre (14,000 m2) city park located in the Mission District of San Francisco, California. It is bounded by 25th Street to the north, 26th Street to the south, Treat Avenue to the west, and Harrison Street to the east and was first opened in 1884. Previously the location of the Recreation Grounds baseball park which was the first professional baseball park in California, dating to 1868.