| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Sanford | 1 | 22,759 | 21,957 | 0.42% | 476 | 48 | City |
| Biddeford | 2 | 22,356 | 22,554 | -0.19% | 743 | 30 | City |
| Saco | 3 | 21,180 | 20,417 | 0.1% | 549 | 39 | City |
| York | 4 | 14,357 | 13,733 | 0.45% | 262 | 55 | Town |
| Kennebunk | 5 | 12,216 | 11,549 | 0.53% | 348 | 35 | Town |
| Wells | 6 | 12,181 | 11,358 | 0.72% | 211 | 58 | Town |
| Kittery | 7 | 11,736 | 10,082 | 2.77% | 659 | 18 | Town |
| Old Orchard Beach | 8 | 9,585 | 8,979 | 0.55% | 1,289 | 7 | Town |
| Buxton | 9 | 8,700 | 8,392 | 0.22% | 215 | 41 | Town |
| Berwick | 10 | 8,514 | 7,975 | 0.92% | 227 | 38 | Town |
| Waterboro | 11 | 8,254 | 7,940 | 0.43% | 149 | 55 | Town |
| South Berwick | 12 | 8,030 | 7,473 | 1.12% | 250 | 32 | Town |
| Eliot | 13 | 7,805 | 6,766 | 2.12% | 395 | 20 | Town |
| Lebanon | 14 | 6,835 | 6,476 | 0.5% | 124 | 55 | Town |
| North Berwick | 15 | 5,413 | 4,993 | 1.08% | 142 | 38 | Town |
| Hollis | 16 | 5,038 | 4,755 | 0.7% | 157 | 32 | Town |
| Lyman | 17 | 4,733 | 4,542 | 0.42% | 121 | 39 | Town |
| Arundel | 18 | 4,657 | 4,290 | 1.33% | 195 | 24 | Town |
| Limington | 19 | 4,206 | 3,898 | 0.79% | 100 | 42 | Town |
| Kennebunkport | 20 | 3,718 | 3,620 | 0.03% | 181 | 21 | Town |
| Limerick | 21 | 3,594 | 3,200 | 0.53% | 132 | 27 | Town |
| Alfred | 22 | 3,190 | 3,058 | 0.06% | 117 | 27 | Town |
| Shapleigh | 23 | 3,025 | 2,924 | 0% | 78 | 39 | Town |
| Acton | 24 | 2,738 | 2,676 | 0.11% | 73 | 38 | Town |
| Dayton | 25 | 2,182 | 2,128 | 0% | 122 | 18 | Town |
| Parsonsfield | 26 | 1,841 | 1,791 | 0.22% | 31 | 59 | Town |
| Newfield | 27 | 1,702 | 1,652 | 0.53% | 53 | 32 | Town |
| Cornish | 28 | 1,613 | 1,516 | 0.69% | 73 | 22 | Town |
| Ogunquit | 29 | 1,604 | 1,578 | -0.12% | 393 | 4 | Town |
Sanford is the largest city in York County, with a population of 22,759.
Ogunquit is the smallest city in York County, with a population of 1,604.
There are 29 cities in York County, Maine.