California

Marin

262,321
2020 population
1850
first census record
18
census records

About Marin

Marin, California, first appears in the United States federal census in 1850, when it recorded a population of 323. At the most recent census, in 2020, its population stood at 262,321.

The county's recorded population has risen across the decades to its highest level in 2020.

On the ground today, 2 documented military engagements have been recorded within the county, among them California Coast Miwok Conflict – Marin County, Nike Missile Battery SF-88 (San Francisco Bay Defense), and 55 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
2020262,321
2010252,409
2000247,289
1990230,096
1980222,568
1970206,038
1960146,820
195085,619
194052,907
193041,648
192027,342
191025,114
190015,702
189013,072
188011,324
18706,903
18603,334
1850323
Source

Population data from the United States decennial census, U.S. Census Bureau (public domain).

Battles & engagements in Marin

Military engagements that took place in Marin, California.

California Coast Miwok Conflict – Marin County
1300
Nike Missile Battery SF-88 (San Francisco Bay Defense)
1954

Historic places in Marin

National Register of Historic Places listings in Marin, California.

Forts Baker, Barry, and Cronkhite
Sausalito
Marconi-RCA Bolinas Transmitting Station
Bolinas
Point Bonita Light Station
Sausalito
Point Reyes Light Station
Point Reyes
San Rafael Improvement Club
San Rafael
St. Hilary's Mission Church
Tiburon
Hamilton Army Air Field Discontiguous Historic District
Novato
Angel Island, U.S. Immigration Station
Tiburon
Rancho Olompali
Novato
Olema Lime Kilns
Olema
Outdoor Art Club
Mill Valley
China Camp
San Rafael
Bradford House
San Rafael
Olema Valley Dairy Ranches Historic District
Olema
Mount Tamalpais Mountain Theater
Mill Valley
Larkspur Downtown Historic District
Larkspur
Point Reyes Lifeboat Rescue Station, 1927
Inverness
Station KPH Operating Station
Marshall
Marin County Civic Center
San Rafael
Sausalito Woman's Club
Sausalito
San Francisco and North Pacific Railroad Station House-Depot
Tiburon
Lyford, Benjamin and Hilarita, House
Tiburon
Dixie Schoolhouse
San Rafael
Tomales Presbyterian Church and Cemetery
Tomales
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Other counties in California

Explore census history and historic records for more California counties.

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Unlimited access

Everything a full report reveals about Marin County, California

This page charts the census history of Marin County, California. A full Aubrey report for an address here pulls together everything the historical record holds about the ground, from the earliest settlement to the twentieth century:

Overview
An interactive map of the location with historic sites, battles and Native heritage plotted, and its full story era by era.
The Land
The historic sites and place names around the location, and how this land was settled and used.
Geology
The bedrock beneath the site, its age and rock type, reaching back millions of years.
LiDAR Terrain
Laser-scanned terrain that reveals earthworks and old features hidden in the landscape.
Conflict & War
The battles, raids and skirmishes fought near here, across every era of American conflict.
The Civil War
The Civil War on this ground, 1861 to 1865: who held it, and the battles, camps and regiments nearby.
The Soldiers
The men who marched from here in the Civil War, named and traced where the record allows.
Native Heritage
The Native nations who held this land, mapped across time from before European contact to today.
Settlement
Who claimed and held this ground, from Indigenous homelands through the colonial powers to the United States.
The Community
How the town grew, who came, and what kind of place it became, traced through the census record.
Rivers & Rail
The rivers, canals and railroads that connected this place between 1830 and 1911.
Notable People
The people born, buried or genuinely tied to this exact place, with their stories.
Historical Maps
Historic maps of the location layered over how it looks today.
Finds & Access
Museum objects tied to the area, and the laws on searching, collecting and access here.
Literature
The old books, county histories and archives that mention this place, quoted with their sources.
Spotlight
A deep dive into the most remarkable, lesser-known history of the place, traced back to the record.
Points of Interest
The most significant historic sites and landmarks near the location, and why they matter.
Timeline
The whole story of the location told era by era, from first peoples to the present day.
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Frequently asked about Marin

When does Marin first appear in the US census?
Marin, California first appears in the federal census in 1850, with a recorded population of 323.
What is the population of Marin?
At the most recent federal census (2020), Marin had a recorded population of 262,321.
Were any battles fought in Marin?
2 documented military engagements took place in Marin, including California Coast Miwok Conflict – Marin County, Nike Missile Battery SF-88 (San Francisco Bay Defense).
How many historic places are in Marin?
55 sites are listed on the National Register of Historic Places in Marin, California.
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