20 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Roseville | 1 | 166,214 | 148,516 | 2.18% | 3,770 | 44.09 | City |
| Rocklin | 2 | 74,605 | 71,772 | 0.77% | 3,766 | 19.81 | City |
| Lincoln | 3 | 57,583 | 49,970 | 2.72% | 2,382 | 24.17 | City |
| Granite Bay | 4 | 22,625 | 22,818 | 0.66% | 1,050 | 21.55 | CDP |
| Auburn | 5 | 13,576 | 13,780 | -0.3% | 1,892 | 7.18 | City |
| Loomis | 6 | 6,743 | 6,832 | -0.27% | 928 | 7.27 | Town |
| Meadow Vista | 7 | 3,682 | 3,508 | 0.85% | 697 | 5.28 | CDP |
| Kings Beach | 8 | 2,287 | 2,826 | -4.23% | 800 | 2.86 | CDP |
| Colfax | 9 | 2,089 | 1,991 | 0.97% | 1,486 | 1.41 | City |
| Newcastle | 10 | 1,570 | 1,360 | 1.49% | 656 | 2.39 | CDP |
| Sunnyside-Tahoe City | 11 | 1,531 | 1,576 | -0.07% | 440 | 3.48 | CDP |
| Sheridan | 12 | 1,437 | 1,120 | 0.91% | 56 | 25.53 | CDP |
| Dollar Point | 13 | 1,238 | 909 | 0.16% | 757 | 1.64 | CDP |
| Cedar Flat | 14 | 1,185 | 886 | 7.14% | 1,097 | 1.08 | CDP |
| Penryn | 15 | 1,182 | 878 | 1.98% | 621 | 1.90 | CDP |
| Tahoe Vista | 16 | 1,106 | 1,233 | -1.86% | 407 | 2.72 | CDP |
| Foresthill | 17 | 1,102 | 1,545 | -2.22% | 99 | 11.19 | CDP |
| Alta | 18 | 662 | 703 | 0.46% | 278 | 2.38 | CDP |
| Carnelian Bay | 19 | 537 | 565 | 0.19% | 413 | 1.30 | CDP |
| Dutch Flat | 20 | 90 | 133 | -5.26% | 152 | 0.59 | CDP |
Roseville is the largest city in Placer County, with a population of 166,214.
Dutch Flat is the smallest city in Placer County.
There are 20 cities in Placer County, California.