There are 20 cities in Napa 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 | 2024 Population | 2020 Population | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Vallejo | 1 | 121,778 | 125,894 | -0.84% | 4,001 | 30.4 | City |
| Fairfield | 2 | 121,079 | 119,833 | 0.26% | 2,912 | 41.6 | City |
| Napa | 3 | 76,878 | 79,334 | -0.79% | 4,260 | 18.0 | City |
| Benicia | 4 | 26,203 | 27,106 | -0.85% | 2,045 | 12.8 | City |
| American Canyon | 5 | 21,196 | 21,799 | -0.71% | 3,488 | 6.1 | City |
| Sonoma | 6 | 10,582 | 10,729 | -0.35% | 3,856 | 2.7 | City |
| Boyes Hot Springs | 7 | 7,494 | 8,006 | 0.81% | 7,070 | 1.1 | CDP |
| St. Helena | 8 | 5,223 | 5,419 | -0.93% | 1,054 | 5.0 | City |
| Calistoga | 9 | 5,003 | 5,222 | -1.09% | 1,940 | 2.6 | City |
| Fetters Hot Springs-Agua Caliente | 10 | 4,237 | 3,554 | 0.14% | 2,900 | 1.5 | CDP |
| Yountville | 11 | 3,332 | 3,428 | -0.71% | 2,236 | 1.5 | City |
| El Verano | 12 | 2,852 | 3,256 | -3.09% | 2,491 | 1.1 | CDP |
| Angwin | 13 | 2,678 | 3,415 | -0.96% | 555 | 4.8 | CDP |
| Temelec | 14 | 1,735 | 1,915 | 1.23% | 1,093 | 1.6 | CDP |
| Glen Ellen | 15 | 1,034 | 1,214 | 1.77% | 492 | 2.1 | CDP |
| Silverado Resort | 16 | 998 | 1,171 | -0.7% | 528 | 1.9 | CDP |
| Deer Park | 17 | 763 | 772 | -4.51% | 136 | 5.6 | CDP |
| Eldridge | 18 | 646 | 960 | -6.11% | 991 | 0.7 | CDP |
| Moskowite Corner | 19 | 135 | 69 | -4.25% | 48 | 2.8 | CDP |
| Rutherford | 20 | 107 | 100 | -3.6% | 64 | 1.7 | 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.
Vallejo is the largest city in Napa County.
Rutherford is the smallest city in Napa County.
There are 20 cities in Napa County, California.