Cities in Marin County, California by Population (2024)

There are 35 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.)

35 Rows

City
Rank
2024 Pop.
2020 Pop.
Change
Density (/mi²)
Area (mi²)
Type
San Francisco1788,478870,518-2.54%16,88446.7City
San Rafael259,02761,137-0.89%3,55916.6City
Petaluma358,48959,733-0.53%4,05814.4City
Novato451,24853,142-0.92%1,87227.4City
Mill Valley513,65514,201-0.99%2,8554.8City
Larkspur612,44213,029-1.17%4,1493.0City
Tamalpais-Homestead Valley712,44012,3310.99%2,6554.7CDP
San Anselmo812,39412,808-0.83%4,6332.7Town
Corte Madera99,85910,209-0.89%3,1203.2Town
Tiburon108,7489,138-1.11%1,9494.5Town
Kentfield117,5647,4231.03%2,4993.0CDP
Fairfax127,3607,586-0.77%3,3032.2Town
Sausalito136,9437,254-1.11%3,9361.8City
Lucas Valley-Marinwood146,3746,7380.32%1,1125.7CDP
Strawberry155,6725,3250.35%4,2651.3CDP
Santa Venetia163,7003,891-1.15%1,0103.7CDP
Marin City173,5443,0401.78%6,6000.5CDP
Sleepy Hollow182,8442,3661.17%9593.0CDP
Ross192,2732,341-0.74%1,4591.6Town
Belvedere202,0242,127-1.27%3,9000.5City
Black Point-Green Point211,7471,7381.81%6392.7CDP
Lagunitas-Forest Knolls221,7351,874-0.34%4094.2CDP
Inverness231,4961,4970.88%2346.4CDP
Woodacre241,3961,4640.29%7771.8CDP
Bolinas251,2231,223-2.32%2105.8CDP
Petaluma Center269901,0207.61%8441.2CDP
Alto27650818-0.76%5,1590.1CDP
Dillon Beach284683092.86%1573.0CDP
San Geronimo29424176-0.24%2811.5CDP
Muir Beach304233601.93%8580.5CDP
Stinson Beach31328583-6.02%3680.9CDP
Point Reyes Station32306210-11.05%853.6CDP
Tomales33174160-1.14%5240.3CDP
Bloomfield34172243-7.03%218.1CDP
Nicasio35971237.78%741.3CDP

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?

Nicasio is the smallest city in Marin County.

How many cities are in Marin County?

There are 35 cities in Marin County, California.

Frequently Asked Questions