20 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Roseville | 1 | 167,000 | 148,520 | 2.26% | 3,788 | 44 | City |
| Rocklin | 2 | 75,968 | 71,772 | 1.12% | 3,835 | 20 | City |
| Lincoln | 3 | 57,842 | 49,972 | 2.8% | 2,393 | 24 | City |
| Granite Bay | 4 | 22,625 | 22,818 | 0.66% | 1,050 | 22 | CDP |
| Auburn | 5 | 13,776 | 13,794 | -0.03% | 1,919 | 7 | City |
| Loomis | 6 | 6,967 | 6,826 | 0.4% | 959 | 7 | Town |
| Meadow Vista | 7 | 3,682 | 3,508 | 0.85% | 697 | 5 | CDP |
| Kings Beach | 8 | 2,287 | 2,826 | -4.23% | 800 | 3 | CDP |
| Colfax | 9 | 2,074 | 1,991 | 0.78% | 1,475 | 1 | City |
| Newcastle | 10 | 1,570 | 1,360 | 1.49% | 656 | 2 | CDP |
| Sunnyside-Tahoe City | 11 | 1,531 | 1,576 | -0.07% | 440 | 3 | CDP |
| Sheridan | 12 | 1,437 | 1,120 | 0.91% | 56 | 26 | CDP |
| Dollar Point | 13 | 1,238 | 909 | 0.16% | 757 | 2 | CDP |
| Cedar Flat | 14 | 1,185 | 886 | 7.14% | 1,097 | 1 | CDP |
| Penryn | 15 | 1,182 | 878 | 1.98% | 621 | 2 | CDP |
| Tahoe Vista | 16 | 1,106 | 1,233 | -1.86% | 407 | 3 | CDP |
| Foresthill | 17 | 1,102 | 1,545 | -2.22% | 99 | 11 | CDP |
| Alta | 18 | 662 | 703 | 0.46% | 278 | 2 | CDP |
| Carnelian Bay | 19 | 537 | 565 | 0.19% | 413 | 1 | CDP |
| Dutch Flat | 20 | 90 | 133 | -5.26% | 152 | 1 | CDP |
Roseville is the largest city in Placer County, with a population of 167,000.
Dutch Flat is the smallest city in Placer County, with a population of 90.
There are 20 cities in Placer County, California.