Explore Sierra Madre local geography, civic resources and voter guides, with dated official population and registration facts for Los Angeles County.
At a glance: Sierra Madre is an incorporated city in Los Angeles County. Population: 10,899 (California Department of Finance estimate as of January 1, 2026). Registered voters: 8,789 (California Secretary of State, as of September 4, 2026).
Sierra Madre nestles against the San Gabriel Mountains between Pasadena and Arcadia. Its small downtown and canyon neighborhoods make the transition from suburban valley to steep mountain terrain particularly visible. Memorial Park and Sierra Vista Park provide local recreation settings. The Sierra Madre Public Library also maintains historical archives jointly with the Sierra Madre Historical Preservation Society, including photographs, maps, newspapers, and oral histories. Sierra Madre incorporated on February 2, 1907, and is a general-law city with a council-manager government. It remains a separate municipality despite its close physical connection to neighboring foothill communities.
Start with the Sierra Madre Historical Archives at the public library. Staff can explain available local-history collections and research access.
The city's archive page describes joint ownership and maintenance by the public library and the Sierra Madre Historical Preservation Society under a 1999 agreement.
Yes. Verify current trail, weather, fire, and access notices with the responsible agencies rather than treating proximity to town as assurance of safe access.
8,789 (California Secretary of State, as of September 4, 2026).
CA Slates began with shared voter guides in 2012 and expanded into its current publication family and connected program.