| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| White | 1 | 14,898 | 15,338 | -0.23% | 352 | 42 | Township |
| North Union | 2 | 11,291 | 11,824 | -0.68% | 291 | 39 | Township |
| South Union | 3 | 10,197 | 10,860 | -1% | 609 | 17 | Township |
| Uniontown | 4 | 9,324 | 9,986 | -1.17% | 4,548 | 2 | City |
| Smithfield | 5 | 7,897 | 7,970 | 0.09% | 344 | 23 | Township |
| Connellsville | 6 | 6,486 | 7,000 | -1.34% | 2,973 | 2 | City |
| Bullskin | 7 | 6,404 | 6,736 | -0.76% | 146 | 44 | Township |
| Dunbar | 8 | 6,323 | 6,642 | -0.75% | 107 | 59 | Township |
| Georges | 9 | 6,047 | 6,360 | -0.74% | 127 | 48 | Township |
| Redstone | 10 | 4,791 | 5,061 | -0.83% | 210 | 23 | Township |
| German | 11 | 4,448 | 4,682 | -0.78% | 133 | 33 | Township |
| Menallen | 12 | 3,939 | 4,091 | -1.03% | 185 | 21 | Township |
| Smithfield | 13 | 3,653 | 4,621 | -8.24% | 664 | 6 | Township |
| Wharton | 14 | 3,278 | 3,355 | -0.94% | 36 | 92 | Township |
| Masontown | 15 | 3,071 | 3,240 | -0.94% | 2,054 | 1 | Borough |
| Saltlick | 16 | 2,886 | 3,032 | -0.76% | 77 | 38 | Township |
| Springhill | 17 | 2,602 | 2,735 | -0.76% | 77 | 34 | Township |
| Perry | 18 | 2,226 | 2,345 | -0.8% | 109 | 20 | Township |
| Oliver | 19 | 2,109 | 2,046 | 0.57% | 256 | 8 | Township |
| Brownsville | 20 | 2,054 | 2,175 | -1.01% | 2,102 | 1 | Borough |
| Oliver | 21 | 2,047 | 2,057 | 0.15% | 59 | 35 | Township |
| Connellsville | 22 | 1,994 | 2,092 | -0.7% | 176 | 11 | Township |
| South Connellsville | 23 | 1,818 | 1,917 | -0.93% | 1,081 | 2 | Borough |
| North Belle Vernon | 24 | 1,805 | 1,875 | -0.66% | 4,298 | 0 | Borough |
| Fairchance | 25 | 1,771 | 1,864 | -0.9% | 1,492 | 1 | Borough |
| Farmington | 26 | 1,726 | 1,776 | -0.23% | 28 | 62 | Township |
| Upper Tyrone | 27 | 1,683 | 1,765 | -0.65% | 216 | 8 | Township |
| Henry Clay | 28 | 1,666 | 1,762 | -0.89% | 33 | 51 | Township |
| Perryopolis | 29 | 1,578 | 1,700 | -1.31% | 1,077 | 1 | Borough |
| Smithfield | 30 | 1,467 | 1,465 | 0.14% | 35 | 42 | Township |
| White | 31 | 1,288 | 1,325 | -0.16% | 1,859 | 1 | Township |
| Farmington | 32 | 1,247 | 1,281 | -0.48% | 36 | 34 | Township |
| Point Marion | 33 | 1,083 | 1,143 | -1.01% | 2,674 | 0 | Borough |
| Speers | 34 | 1,042 | 1,070 | -0.48% | 1,096 | 1 | Borough |
| Lower Tyrone | 35 | 1,021 | 1,067 | -0.68% | 64 | 16 | Township |
| Oliver | 36 | 978 | 1,007 | -0.2% | 33 | 30 | Township |
| Belle Vernon | 37 | 969 | 1,024 | -1.02% | 3,713 | 0 | Borough |
| Dunbar | 38 | 969 | 1,022 | -0.92% | 1,676 | 1 | Borough |
| West Brownsville | 39 | 958 | 972 | -0.21% | 737 | 1 | Borough |
| White | 40 | 910 | 918 | 0.11% | 45 | 20 | Township |
| New Salem | 41 | 824 | 816 | 0.24% | 1,742 | 0 | Borough |
| Smithfield | 42 | 785 | 828 | -1.01% | 1,096 | 1 | Borough |
| Everson | 43 | 729 | 768 | -0.95% | 3,375 | 0 | Borough |
| Farmington | 44 | 650 | 659 | -0.31% | 21 | 32 | Township |
| Stewart | 45 | 605 | 619 | -0.82% | 12 | 50 | Township |
| Brownsville | 46 | 507 | 535 | -0.78% | 336 | 2 | Township |
| Newell | 47 | 485 | 512 | -1.02% | 825 | 1 | Borough |
| Fayette City | 48 | 471 | 499 | -1.05% | 2,122 | 0 | Borough |
| Vanderbilt | 49 | 391 | 412 | -1.01% | 2,114 | 0 | Borough |
| Dawson | 50 | 332 | 351 | -1.19% | 1,919 | 0 | Borough |
| Markleysburg | 51 | 232 | 241 | -0.85% | 781 | 0 | Borough |
| Allison | 52 | 221 | 222 | 0% | 145 | 2 | Township |
| Casselman | 53 | 123 | 104 | 3.36% | 612 | 0 | Borough |
| New Centerville | 54 | 120 | 126 | -0.83% | 845 | 0 | Borough |
| Ohiopyle | 55 | 35 | 38 | -2.78% | 84 | 0 | Borough |
| Seven Springs | 56 | 20 | 20 | 0% | 19 | 1 | Borough |
White is the largest city in Fayette County, with a population of 14,898.
Seven Springs is the smallest city in Fayette County, with a population of 20.
There are 56 cities in Fayette County, Pennsylvania.