54 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Olean | 1 | 13,476 | 13,910 | -0.64% | 2,284 | 5.90 | City |
| Allegany town | 2 | 7,324 | 7,490 | -0.37% | 103 | 70.94 | Town |
| Salamanca | 3 | 5,684 | 5,931 | -0.85% | 948 | 5.99 | City |
| Yorkshire town | 4 | 3,693 | 3,824 | -0.75% | 100 | 36.90 | Town |
| Portville town | 5 | 3,351 | 3,502 | -0.92% | 94 | 35.63 | Town |
| Franklinville town | 6 | 2,693 | 2,798 | -0.74% | 52 | 51.81 | Town |
| Gowanda | 7 | 2,415 | 2,517 | -0.82% | 1,516 | 1.59 | Village |
| Randolph town | 8 | 2,369 | 2,466 | -0.92% | 66 | 36.04 | Town |
| Machias town | 9 | 2,290 | 2,308 | 0.13% | 57 | 40.43 | Town |
| Freedom town | 10 | 2,160 | 2,258 | -0.96% | 54 | 40.37 | Town |
| Persia town | 11 | 2,106 | 2,213 | -1.13% | 101 | 20.89 | Town |
| St. Bonaventure | 12 | 2,105 | 2,015 | 0.19% | 1,104 | 1.91 | CDP |
| Hinsdale town | 13 | 2,055 | 2,112 | -0.77% | 53 | 38.73 | Town |
| Great Valley town | 14 | 1,937 | 1,991 | -0.36% | 39 | 50.12 | Town |
| New Albion town | 15 | 1,914 | 1,977 | -0.67% | 53 | 36.13 | Town |
| Ashford town | 16 | 1,887 | 1,966 | -0.89% | 37 | 51.24 | Town |
| Olean town | 17 | 1,810 | 1,883 | -0.82% | 61 | 29.60 | Town |
| Conewango town | 18 | 1,712 | 1,790 | -0.98% | 47 | 36.12 | Town |
| Little Valley town | 19 | 1,634 | 1,660 | -0.49% | 55 | 29.91 | Town |
| Franklinville | 20 | 1,621 | 1,698 | -0.92% | 1,474 | 1.10 | Village |
| Dayton town | 21 | 1,618 | 1,687 | -0.92% | 45 | 35.63 | Town |
| Allegany | 22 | 1,529 | 1,593 | -0.84% | 1,973 | 0.78 | Village |
| Perrysburg town | 23 | 1,470 | 1,516 | -0.61% | 52 | 28.42 | Town |
| Ellicottville town | 24 | 1,299 | 1,313 | -0.23% | 29 | 45.09 | Town |
| Leon town | 25 | 1,243 | 1,248 | -0.08% | 34 | 36.08 | Town |
| Weston Mills | 26 | 1,206 | 1,297 | -1.47% | 171 | 7.05 | CDP |
| Napoli town | 27 | 1,184 | 1,173 | -0.59% | 33 | 36.38 | Town |
| Carrollton town | 28 | 1,163 | 1,210 | -0.94% | 28 | 42.23 | Town |
| Randolph | 29 | 1,072 | 1,041 | 7.09% | 330 | 3.25 | CDP |
| Little Valley | 30 | 1,049 | 1,074 | -0.47% | 1,047 | 1 | Village |
| Farmersville town | 31 | 1,032 | 1,073 | -0.86% | 22 | 47.84 | Town |
| Yorkshire | 32 | 1,026 | 1,005 | -0.97% | 556 | 1.85 | CDP |
| Delevan | 33 | 1,014 | 1,059 | -0.88% | 1,020 | 0.99 | Village |
| East Otto town | 34 | 950 | 973 | -0.52% | 23 | 41.20 | Town |
| Cattaraugus | 35 | 948 | 990 | -0.84% | 849 | 1.12 | Village |
| Portville | 36 | 870 | 912 | -0.91% | 1,085 | 0.80 | Village |
| Mansfield town | 37 | 856 | 840 | 0.47% | 22 | 39.62 | Town |
| Otto town | 38 | 767 | 773 | 0% | 24 | 32.10 | Town |
| Lime Lake | 39 | 727 | 819 | -1.22% | 306 | 2.38 | CDP |
| Ischua town | 40 | 698 | 731 | -0.99% | 22 | 32.38 | Town |
| East Randolph | 41 | 689 | 656 | 7.15% | 621 | 1.11 | CDP |
| Humphrey town | 42 | 681 | 698 | -0.73% | 19 | 36.59 | Town |
| Lyndon town | 43 | 678 | 683 | -0.15% | 20 | 33.23 | Town |
| Coldspring town | 44 | 644 | 657 | -0.31% | 13 | 51.44 | Town |
| Machias | 45 | 605 | 571 | 1.51% | 617 | 0.98 | CDP |
| South Dayton | 46 | 540 | 565 | -0.92% | 537 | 1.01 | Village |
| Perrysburg | 47 | 539 | 437 | 7.16% | 548 | 0.98 | CDP |
| Limestone | 48 | 532 | 458 | 7.04% | 315 | 1.69 | CDP |
| West Valley | 49 | 489 | 579 | -0.41% | 319 | 1.53 | CDP |
| Salamanca town | 50 | 453 | 470 | -0.66% | 25 | 18.25 | Town |
| Sunset Bay | 51 | 292 | 429 | -7.89% | 440 | 0.66 | CDP |
| Ellicottville | 52 | 284 | 284 | 0% | 346 | 0.82 | Village |
| South Valley town | 53 | 241 | 250 | -0.82% | 7 | 36.83 | Town |
| Red House town | 54 | 29 | 30 | 0% | 1 | 55.64 | Town |
Olean is the largest city in Cattaraugus County, with a population of 13,476.
Red House town is the smallest city in Cattaraugus County.
There are 54 cities in Cattaraugus County, New York.