| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Martinsville | 1 | 12,159 | 11,924 | 0.15% | 1,328 | 9 | City |
| Mooresville | 2 | 10,321 | 9,438 | 1.45% | 1,539 | 7 | Town |
| Monrovia | 3 | 2,643 | 1,689 | 6.36% | 1,371 | 2 | Town |
| Brooklyn | 4 | 2,640 | 2,511 | 0.72% | 2,667 | 1 | Town |
| Morgantown | 5 | 1,005 | 1,018 | -0.2% | 2,659 | 0 | Town |
| Paragon | 6 | 588 | 558 | 0.68% | 2,138 | 0 | Town |
Martinsville is the largest city in Morgan County, with a population of 12,159.
Paragon is the smallest city in Morgan County, with a population of 588.
There are 6 cities in Morgan County, Indiana.