Cities in Marin County, California by Population (2024)

There are 36 cities in Marin County, California.

Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)

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City
Rank
State
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
San Francisco1California746,481870,393-3.98%15,98546.70
San Rafael2California58,81261,130-0.97%3,54616.59
Petaluma3California57,52859,776-0.97%3,99114.41
Novato4California51,26853,100-0.89%1,87327.37
Mill Valley5California13,80114,211-0.73%2,8864.78
Larkspur6California12,46313,045-1.15%4,1563
San Anselmo7California12,33412,804-0.94%4,6112.67
Tamalpais-Homestead Valley8California12,06112,331-0.55%2,5744.68
Corte Madera9California9,79510,217-1.06%3,1003.16
Tiburon10California8,7479,129-1.07%1,9494.49
Kentfield11California7,3977,423-0.08%2,4443.03
Fairfax12California7,2607,586-1.1%3,2592.23
Sausalito13California6,9387,252-1.11%3,9331.76
Strawberry14California5,9395,3252.66%4,4651.33
Lucas Valley-Marinwood15California5,9306,738-3.29%1,0355.73
Marin City16California3,7983,0405.27%7,0730.54
Santa Venetia17California3,6793,891-1.42%1,0043.66
Sleepy Hollow18California3,1902,3666.9%1,0762.97
Ross19California2,2582,342-0.92%1,4491.56
Belvedere20California2,0342,126-1.12%3,9190.52
Lagunitas-Forest Knolls21California1,7571,8740.29%4144.25
Black Point-Green Point22California1,6301,738-1.63%5962.73
Inverness23California1,4411,497-0.96%2256.40
Bolinas24California1,3371,2232.22%2295.83
Woodacre25California1,3141,464-2.74%7311.80
Petaluma Center26California8731,0201.39%7441.17
San Geronimo27California67817622.83%4501.51
Point Reyes Station28California55621018.55%1543.62
Dillon Beach29California5383099.8%1802.98
Alto30California500818-13.64%3,9680.13
Muir Beach31California361360-5.99%7320.49
Bloomfield32California2152434.37%268.14
Tomales33California1961604.81%5900.33
Stinson Beach34California159583-40%1780.89
Nicasio35California43123-31.75%331.30
Valley Ford36California000%02.64
showing: 36 rows

Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.

What is the largest city in Marin County, California?

San Francisco is the largest city in Marin County.

What is the smallest city in Marin County, California?

Valley Ford is the smallest city in Marin County.

How many cities are in Marin County?

There are 36 cities in Marin County, California.

Frequently Asked Questions