Explore Menlo Park local geography, civic resources and voter guides, with dated official population and registration facts for San Mateo County.
At a glance: Menlo Park is an incorporated city in San Mateo County. Population: 33,785 (California Department of Finance estimate as of January 1, 2026). Registered voters: 21,236 (California Secretary of State, as of September 4, 2026).
Menlo Park extends from residential areas near the foothills to Belle Haven and the Bay shore. Downtown Santa Cruz Avenue, the Caltrain corridor and the city's eastern employment areas give it several distinct geographic identities. Burgess Park provides a major recreation setting near the civic center. In Belle Haven, the Belle Haven Community Campus brings together a library, pool, youth center, senior center and the Onetta Harris Community Center in a shared facility. The present City of Menlo Park incorporated on November 23, 1927, and operates as a general-law city with a council-manager government. The date is documented in the county's municipal profile, distinct from earlier local incorporation history.
The campus houses Belle Haven Library, Belle Haven Pool, Belle Haven Youth Center, Menlo Park Senior Center and Onetta Harris Community Center.
No. Nearby unincorporated communities can use Menlo Park mailing addresses. Verify the parcel's jurisdiction before seeking permits or municipal services.
San Mateo County elections provides voter registration and voting services, while the city clerk maintains municipal election records.
21,236 (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.