Marin County

San Anselmo, CA Business Index

San Anselmo is a town in Marin County with an estimated 12,555 residents as of 2025, down 2.0% since 2020. San Anselmo's business base is indexed below across 48 owner-operated industries.

Population (2025)
12,555
U.S. Census Bureau estimate
Change since 2020
-2.0%
2020–2025
Land area
2.7 sq mi
2023 Census Gazetteer
Density
4,693/sq mi
Residents per square mile

Population trend

Annual resident population estimates, U.S. Census Bureau Population Estimates Program.

YearPopulationYear over year
202012,809n/a
202112,772-0.29%
202212,629-1.12%
202312,552-0.61%
202412,607+0.44%
202512,555-0.41%

San Anselmo holds 4.9% of Marin County’s 253,694 residents.

Industries in Marin County

San Anselmo businesses compete in the Marin County market. Establishment counts, employment and payroll below are reported at county level by the U.S. Census Bureau.

HVAC & PlumbingViewElectricalViewRoofingViewLandscapingViewPest ControlViewPool ServiceViewCommercial CleaningViewFlooringViewGlass & GlazingViewSeptic & WellViewAuto RepairViewAuto BodyViewCar WashViewTowingViewTruckingViewEquipment RentalViewDentalViewVeterinaryViewHome HealthViewPharmacyViewMedical PracticeViewOptometryViewAccountingViewInsurance AgencyViewIT & MSPViewStaffingViewEngineeringViewArchitectureViewLaw FirmViewSecurity ServicesViewPrintingViewSign ShopsViewMachine ShopsView
Metal FabricationPending
PlasticsPending
Food ManufacturingPending
MillworkViewRestaurantsViewBakeriesViewLiquor StoresViewGyms & FitnessViewSalons & SpasViewLaundromatsViewDry CleaningViewFuneral HomesViewSelf StorageViewChildcareViewPet ServicesView

Nearby cities

Other indexed places in Marin County and the surrounding area.

San Rafael59,410Novato51,947Mill Valley13,799Larkspur12,620Corte Madera9,929Tiburon8,881Fairfax7,417Sausalito7,019Ross2,304
Data last refreshed from source on 2026-09-08.

Sources

  1. U.S. Census Bureau, Population Estimates Program (Vintage 2025). Subcounty resident population estimates. Retrieved 2026-09-08.
  2. U.S. Census Bureau, 2023 Gazetteer Files. Land area and internal point coordinates. Retrieved 2026-09-08.
  3. U.S. Census Bureau, ANSI/FIPS Place-to-County Relationship File Retrieved 2026-09-08.