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 | 38,614 | 39,161 | -0.35% | 2,420 | 16.0 | City |
| Niles | 2 | 18,201 | 18,420 | -0.3% | 2,116 | 8.6 | City |
| Girard | 3 | 9,433 | 9,575 | -0.38% | 1,672 | 5.6 | City |
| Hubbard | 4 | 7,551 | 7,619 | -0.22% | 1,874 | 4.0 | City |
| Cortland | 5 | 7,050 | 7,096 | -0.17% | 1,628 | 4.3 | City |
| Howland Center | 6 | 6,252 | 6,417 | -0.11% | 1,544 | 4.0 | CDP |
| Newton Falls | 7 | 4,523 | 4,566 | -0.24% | 1,531 | 3.0 | Village |
| Mineral Ridge | 8 | 3,966 | 4,130 | 0.15% | 1,113 | 3.6 | CDP |
| Masury | 9 | 2,237 | 2,088 | 0.58% | 646 | 3.5 | CDP |
| West Hill | 10 | 2,225 | 2,031 | -0.18% | 1,502 | 1.5 | CDP |
| Churchill | 11 | 2,109 | 1,995 | -0.14% | 838 | 2.5 | CDP |
| Bolindale | 12 | 1,994 | 2,258 | -0.35% | 2,028 | 1.0 | CDP |
| Morgandale | 13 | 1,384 | 887 | 0.88% | 521 | 2.7 | CDP |
| Brookfield Center | 14 | 1,263 | 1,375 | 0.32% | 433 | 2.9 | CDP |
| Leavittsburg | 15 | 973 | 1,468 | -6.89% | 656 | 1.5 | CDP |
| McKinley Heights | 16 | 918 | 745 | -1.08% | 1,013 | 0.9 | CDP |
| Vienna Center | 17 | 651 | 508 | 0% | 680 | 1.0 | CDP |
| West Farmington | 18 | 530 | 538 | -0.38% | 587 | 0.9 | Village |
| Orangeville | 19 | 168 | 174 | -1.18% | 226 | 0.7 | Village |
| Yankee Lake | 20 | 73 | 75 | -1.35% | 130 | 0.6 | Village |
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 Trumbull County.
Yankee Lake is the smallest city in Trumbull County.
There are 20 cities in Trumbull County, Ohio.