Explore Rocklin local geography, civic resources and voter guides, with dated official population and registration facts for Placer County.
At a glance: Rocklin is an incorporated city in Placer County. Population: 74,842 (California Department of Finance estimate as of January 1, 2026). Registered voters: 48,769 (California Secretary of State, as of September 4, 2026).
Rocklin occupies rolling terrain northeast of Roseville, where former granite-quarry landscapes now sit among suburban neighborhoods. Quarry Park makes the city's stone-working landscape part of its public realm. Johnson-Springview Park and the Rocklin library provide additional recreation and learning destinations. Rocklin is an incorporated city in Placer County. Rocklin incorporated in 1893.
It incorporates Rocklin's former quarry landscape into a public recreation setting.
Johnson-Springview Park is a major city park.
Placer County Elections serves registered voters in Rocklin.
48,769 (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.