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 | 2024 Pop. | 2020 Pop. | Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Santa Rosa | 1 | 175,140 | 177,959 | -0.4% | 4,117 | 42.5 | City |
| Petaluma | 2 | 58,489 | 59,733 | -0.53% | 4,058 | 14.4 | City |
| Rohnert Park | 3 | 44,572 | 44,467 | 0.06% | 6,117 | 7.3 | City |
| Windsor | 4 | 25,657 | 26,340 | -0.66% | 3,450 | 7.4 | Town |
| Healdsburg | 5 | 11,067 | 11,346 | -0.63% | 2,504 | 4.4 | City |
| Sonoma | 6 | 10,582 | 10,729 | -0.35% | 3,856 | 2.7 | City |
| Cloverdale | 7 | 8,762 | 9,014 | -0.71% | 2,605 | 3.4 | City |
| Boyes Hot Springs | 8 | 7,494 | 8,006 | 0.81% | 7,070 | 1.1 | CDP |
| Larkfield-Wikiup | 9 | 7,489 | 8,080 | -1.31% | 1,411 | 5.3 | CDP |
| Cotati | 10 | 7,376 | 7,590 | -0.73% | 3,936 | 1.9 | City |
| Sebastopol | 11 | 7,335 | 7,515 | -0.61% | 3,897 | 1.9 | City |
| Guerneville | 12 | 4,802 | 4,747 | 0.4% | 495 | 9.7 | CDP |
| Forestville | 13 | 3,688 | 3,788 | 0.77% | 702 | 5.3 | CDP |
| El Verano | 14 | 2,852 | 3,256 | -3.09% | 2,491 | 1.1 | CDP |
| Penngrove | 15 | 2,128 | 2,368 | -1.3% | 528 | 4.0 | CDP |
| Sonoma State University | 16 | 1,992 | 1,407 | 7.73% | 4,777 | 0.4 | CDP |
| Graton | 17 | 1,665 | 1,743 | -0.18% | 1,054 | 1.6 | CDP |
| Sea Ranch | 18 | 1,210 | 1,156 | -0.57% | 75 | 16.1 | CDP |
| Bodega Bay | 19 | 1,204 | 1,069 | 0.75% | 144 | 8.4 | CDP |
| Occidental | 20 | 1,052 | 876 | -0.38% | 212 | 5.0 | CDP |
| Glen Ellen | 21 | 1,034 | 1,214 | 1.77% | 492 | 2.1 | CDP |
| Geyserville | 22 | 833 | 671 | -0.24% | 185 | 4.5 | CDP |
| Fulton | 23 | 784 | 413 | 2.35% | 402 | 1.9 | CDP |
| Monte Rio | 24 | 708 | 1,023 | -4.2% | 372 | 1.9 | CDP |
| Eldridge | 25 | 646 | 960 | -6.11% | 991 | 0.7 | CDP |
| Bodega | 26 | 602 | 590 | 4.88% | 207 | 2.9 | CDP |
| Kenwood | 27 | 539 | 540 | -6.1% | 104 | 5.2 | CDP |
| Cazadero | 28 | 430 | 340 | 1.42% | 60 | 7.1 | CDP |
| Timber Cove | 29 | 247 | 107 | 2.49% | 44 | 5.7 | CDP |
| Sereno Mar | 30 | 93 | 57 | -3.13% | 126 | 0.7 | CDP |
| Carmet | 31 | 70 | 0 | 7.69% | 244 | 0.3 | CDP |
| Salmon Creek | 32 | 9 | 20 | 0% | 8 | 1.1 | CDP |
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.
Santa Rosa is the largest city in Sonoma County.
Salmon Creek is the smallest city in Sonoma County.
There are 32 cities in Sonoma County, California.