Explore San Marino local geography, civic resources and voter guides, with dated official population and registration facts for Los Angeles County.
At a glance: San Marino is an incorporated city in Los Angeles County. Population: 12,513 (California Department of Finance estimate as of January 1, 2026). Registered voters: 9,203 (California Secretary of State, as of September 4, 2026).
San Marino is a predominantly residential community south of Pasadena in the San Gabriel Valley. Broad landscaped streets and large institutional gardens give it a greener, lower-rise character than neighboring commercial corridors. Lacy Park provides lawns, walking paths, and a rose garden, while Crowell Public Library serves as a municipal learning and gathering place. The Huntington is a separate cultural institution, not a city park or library department. San Marino incorporated on April 25, 1913, bringing together portions of several ranch properties and subdivisions. It is a general-law city with a council-manager government; the city's historical account connects its formation to the Wilson, Patton, and Huntington ranches.
No. Crowell is San Marino's public library; the Huntington is a separate research and cultural institution with its own admission arrangements.
The city's park history describes the site as Wilson Lake. The city purchased the land in 1925 to create a municipal park.
Yes. Confirm current resident and nonresident access policies with the city rather than assuming every day has identical admission arrangements.
9,203 (California Secretary of State, as of September 4, 2026).
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