Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | 2024 Pop. | 2020 Pop. | Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Warren | 1 | 9,040 | 9,380 | -0.93% | 3,105 | 2.9 | City |
| Conewango township | 2 | 3,333 | 3,420 | -0.51% | 111 | 30.0 | Township |
| Pleasant township | 3 | 2,188 | 2,246 | -0.55% | 65 | 33.7 | Township |
| Glade township | 4 | 1,976 | 2,036 | -0.6% | 55 | 36.0 | Township |
| Sheffield township | 5 | 1,776 | 1,845 | -0.84% | 30 | 59.2 | Township |
| Brokenstraw township | 6 | 1,664 | 1,723 | -0.78% | 44 | 38.0 | Township |
| Youngsville | 7 | 1,663 | 1,726 | -0.95% | 1,250 | 1.3 | Borough |
| Sugar Grove township | 8 | 1,558 | 1,614 | -0.7% | 44 | 35.4 | Township |
| Columbus township | 9 | 1,553 | 1,600 | -0.64% | 38 | 40.6 | Township |
| Mead township | 10 | 1,263 | 1,295 | -0.47% | 16 | 78.6 | Township |
| Pittsfield township | 11 | 1,246 | 1,279 | -0.48% | 22 | 55.6 | Township |
| Freehold township | 12 | 1,168 | 1,210 | -0.77% | 33 | 35.7 | Township |
| Warren township | 13 | 1,024 | 1,021 | 0.2% | 24 | 42.5 | Township |
| Tidioute | 14 | 608 | 628 | -0.82% | 567 | 1.1 | Borough |
| Sugar Grove | 15 | 539 | 557 | -0.92% | 481 | 1.1 | Borough |
| Clarendon | 16 | 398 | 410 | -0.75% | 1,181 | 0.3 | Borough |
| Bear Lake | 17 | 145 | 148 | -0.69% | 210 | 0.7 | Borough |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Warren is the largest city in Warren County.
Bear Lake is the smallest city in Warren County.
There are 17 cities in Warren County, Pennsylvania.