California

Marin County

Marin County has an estimated 253,694 residents as of 2025 across 11 incorporated places, a decline of 2.9% since 2020.

Population (2025)
253,694
Census Bureau estimate
Change since 2020
-2.9%
Resident population
Incorporated places
11
Cities, towns and CDPs
Unincorporated share
26%
Residents outside city limits

Industries in Marin County

2,811 establishments indexed

Establishment and employment counts from the U.S. Census Bureau County Business Patterns program.

IndustryNAICSEstablishmentsEmployees
HVAC & Plumbing238220100943
Electrical238210101707
Roofing2381601785
Landscaping561730149918
Pest Control5617101033
Pool Service56179018216
Commercial Cleaning561720761,730
Flooring2383302176
Glass & Glazing238150831
Septic & Well23891018168
Auto Repair81111192483
Auto Body81112142374
Car Wash81119213919
Towing488410750
Trucking484110, 4841211180
Equipment Rental532412381
Dental6212101771,160
Veterinary54194039468
Home Health62161024823
Pharmacy44611029693
Medical Practice6211112551,823
Optometry62132024118
Accounting541211, 541213118556
Insurance Agency524210122541
IT & MSP541513, 54151274250
Staffing561320, 56131135761
Engineering54133085536
Architecture54131082304
Law Firm541110226944
Security Services5616126351
Printing3231111046
Sign Shops339950326
Machine Shops332710570
Metal Fabrication332322, 332312n/an/a
Plastics326199n/an/a
Food Manufacturing311999, 311812n/an/a
Millwork337110, 321918936
Restaurants7225112805,940
Bakeries311811974
Liquor Stores44531021117
Gyms & Fitness713940861,512
Salons & Spas812112, 812113, 812199171808
Laundromats812310930
Dry Cleaning81232031135
Funeral Homes812210414
Self Storage5311302037
Childcare6244101301,266
Pet Services81291041470

Cities in Marin County

11
San Rafael59.4KNovato51.9KMill Valley13.8KLarkspur12.6KSan Anselmo12.6KCorte Madera9.9KTiburon8.9KFairfax7.4KSausalito7KRoss2.3KBelvedere2.1K

Sources

  1. U.S. Census Bureau, Population Estimates Program (Vintage 2025). Subcounty resident population estimates. Retrieved 2026-09-08.