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.)
City | Rank | State | 2024 Population | 2020 Census | Annual Change | Density (mi²) | Area (mi²) |
|---|---|---|---|---|---|---|---|
| San Francisco | 1 | California | 788,478 | 870,518 | -2.54% | 16,884 | 46.70 |
| San Rafael | 2 | California | 59,027 | 61,137 | -0.89% | 3,559 | 16.59 |
| Petaluma | 3 | California | 58,489 | 59,733 | -0.53% | 4,058 | 14.41 |
| Novato | 4 | California | 51,248 | 53,142 | -0.92% | 1,872 | 27.37 |
| Mill Valley | 5 | California | 13,655 | 14,201 | -0.99% | 2,855 | 4.78 |
| Larkspur | 6 | California | 12,442 | 13,029 | -1.17% | 4,149 | 3 |
| San Anselmo | 7 | California | 12,394 | 12,808 | -0.83% | 4,633 | 2.67 |
| Tamalpais-Homestead Valley | 8 | California | 12,061 | 12,331 | -0.55% | 2,574 | 4.68 |
| Corte Madera | 9 | California | 9,859 | 10,209 | -0.89% | 3,120 | 3.16 |
| Tiburon | 10 | California | 8,748 | 9,138 | -1.11% | 1,949 | 4.49 |
| Kentfield | 11 | California | 7,397 | 7,423 | -0.08% | 2,444 | 3.03 |
| Fairfax | 12 | California | 7,360 | 7,586 | -0.77% | 3,303 | 2.23 |
| Sausalito | 13 | California | 6,943 | 7,254 | -1.11% | 3,936 | 1.76 |
| Strawberry | 14 | California | 5,939 | 5,325 | 2.66% | 4,465 | 1.33 |
| Lucas Valley-Marinwood | 15 | California | 5,930 | 6,738 | -3.29% | 1,035 | 5.73 |
| Marin City | 16 | California | 3,798 | 3,040 | 5.27% | 7,073 | 0.54 |
| Santa Venetia | 17 | California | 3,679 | 3,891 | -1.42% | 1,004 | 3.66 |
| Sleepy Hollow | 18 | California | 3,190 | 2,366 | 6.9% | 1,076 | 2.97 |
| Ross | 19 | California | 2,273 | 2,341 | -0.74% | 1,459 | 1.56 |
| Belvedere | 20 | California | 2,024 | 2,127 | -1.27% | 3,900 | 0.52 |
| Lagunitas-Forest Knolls | 21 | California | 1,757 | 1,874 | 0.29% | 414 | 4.25 |
| Black Point-Green Point | 22 | California | 1,630 | 1,738 | -1.63% | 596 | 2.73 |
| Inverness | 23 | California | 1,441 | 1,497 | -0.96% | 225 | 6.40 |
| Bolinas | 24 | California | 1,337 | 1,223 | 2.22% | 229 | 5.83 |
| Woodacre | 25 | California | 1,314 | 1,464 | -2.74% | 731 | 1.80 |
| Petaluma Center | 26 | California | 873 | 1,020 | 1.39% | 744 | 1.17 |
| San Geronimo | 27 | California | 678 | 176 | 22.83% | 450 | 1.51 |
| Point Reyes Station | 28 | California | 556 | 210 | 18.55% | 154 | 3.62 |
| Dillon Beach | 29 | California | 538 | 309 | 9.8% | 180 | 2.98 |
| Alto | 30 | California | 500 | 818 | -13.64% | 3,968 | 0.13 |
| Muir Beach | 31 | California | 361 | 360 | -5.99% | 732 | 0.49 |
| Bloomfield | 32 | California | 215 | 243 | 4.37% | 26 | 8.14 |
| Tomales | 33 | California | 196 | 160 | 4.81% | 590 | 0.33 |
| Stinson Beach | 34 | California | 159 | 583 | -40% | 178 | 0.89 |
| Nicasio | 35 | California | 43 | 123 | -31.75% | 33 | 1.30 |
| Valley Ford | 36 | California | 0 | 0 | 0% | 0 | 2.64 |
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.
San Francisco is the largest city in Marin County.
Valley Ford is the smallest city in Marin County.
There are 36 cities in Marin County, California.