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Mill Valley

Mill Valley, Marin County, California. Population: 13,694 (January 1, 2026 provisional estimate).

City

Mill Valley

Mill Valley, Marin County, California. Population: 13,694 (January 1, 2026 provisional estimate).

County
Marin County
State
California
Population
13,694
Population date
January 1, 2026
Estimate
Provisional; California Department of Finance
Related objects (1)Marin County

Mill Valley is one of Marin County’s 11 incorporated cities and towns. The California Department of Finance estimates its population at 13,694 as of January 1, 2026. This provisional population estimate counts residents; it is not a count of records in this directory.

Browse records associated with Mill Valley. The collection page shows current counts by object class and links to each record.

References (2)
  1. E-1 population estimates, January 1, 2026 — California Department of Finance
  2. E-1 estimates and methodology — California Department of Finance