24 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| San Jose | 1 | 943,212 | 1,009,319 | -1.38% | 5,301 | 177.94 | City |
| Sunnyvale | 2 | 149,778 | 155,250 | -0.73% | 6,790 | 22.06 | City |
| Santa Clara | 3 | 132,711 | 128,588 | 0.63% | 7,261 | 18.28 | City |
| Mountain View | 4 | 81,131 | 82,766 | -0.4% | 6,785 | 11.96 | City |
| Milpitas | 5 | 75,673 | 79,792 | -1.08% | 5,613 | 13.48 | City |
| Palo Alto | 6 | 64,232 | 68,357 | -1.27% | 2,671 | 24.05 | City |
| Gilroy | 7 | 57,484 | 59,398 | -0.66% | 3,476 | 16.54 | City |
| Cupertino | 8 | 55,401 | 60,111 | -1.67% | 4,885 | 11.34 | City |
| Morgan Hill | 9 | 43,673 | 45,685 | -0.91% | 3,376 | 12.94 | City |
| Campbell | 10 | 40,310 | 43,784 | -1.69% | 6,629 | 6.08 | City |
| Los Gatos | 11 | 31,416 | 33,415 | -1.26% | 2,719 | 11.55 | Town |
| Los Altos | 12 | 29,083 | 31,350 | -1.53% | 4,447 | 6.54 | City |
| Saratoga | 13 | 28,736 | 30,913 | -1.49% | 2,249 | 12.78 | City |
| Stanford | 14 | 18,117 | 16,200 | 1.62% | 6,588 | 2.75 | CDP |
| Alum Rock | 15 | 10,905 | 11,798 | -2.76% | 12,549 | 0.87 | CDP |
| East Foothills | 16 | 8,270 | 6,815 | 0% | 3,888 | 2.13 | CDP |
| Los Altos Hills | 17 | 7,989 | 8,489 | -1.24% | 881 | 9.07 | Town |
| San Martin | 18 | 6,104 | 6,498 | -1.01% | 526 | 11.60 | CDP |
| Loyola | 19 | 3,957 | 3,404 | 1.18% | 2,847 | 1.39 | CDP |
| Cambrian Park | 20 | 3,618 | 3,015 | 0.61% | 6,260 | 0.58 | CDP |
| Monte Sereno | 21 | 3,451 | 3,471 | -0.12% | 2,112 | 1.63 | City |
| Lexington Hills | 22 | 2,629 | 2,656 | 0.54% | 557 | 4.72 | CDP |
| Mountain View | 23 | 2,115 | 1,872 | -0.8% | 7,369 | 0.29 | CDP |
| Fruitdale | 24 | 1,290 | 1,184 | 1.9% | 4,831 | 0.27 | CDP |
San Jose is the largest city in Santa Clara County, with a population of 943,212.
Fruitdale is the smallest city in Santa Clara County.
There are 24 cities in Santa Clara County, California.