17 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Brown | 1 | 14,588 | 13,445 | 1.56% | 653 | 22 | Township |
| Martinsville | 2 | 11,965 | 11,925 | 0.06% | 1,307 | 9 | City |
| Mooresville | 3 | 10,317 | 9,446 | 1.43% | 1,538 | 7 | Town |
| Clay | 4 | 4,360 | 4,250 | 0.72% | 145 | 30 | Township |
| Jackson | 5 | 3,760 | 3,687 | 0.59% | 106 | 36 | Township |
| Green | 6 | 3,717 | 3,629 | 0.68% | 112 | 33 | Township |
| Jefferson | 7 | 3,698 | 3,598 | 0.76% | 106 | 35 | Township |
| Gregg | 8 | 3,054 | 2,958 | 0.79% | 120 | 25 | Township |
| Monrovia | 9 | 2,638 | 1,690 | 6.37% | 1,368 | 2 | Town |
| Brooklyn | 10 | 2,635 | 2,514 | 0.76% | 2,662 | 1 | Town |
| Ashland | 11 | 1,848 | 1,766 | 0.98% | 58 | 32 | Township |
| Ray | 12 | 1,625 | 1,569 | 0.87% | 64 | 26 | Township |
| Harrison | 13 | 1,583 | 1,541 | 0.76% | 184 | 9 | Township |
| Adams | 14 | 1,258 | 1,213 | 0.96% | 42 | 30 | Township |
| Morgantown | 15 | 989 | 1,016 | -0.4% | 2,616 | 0 | Town |
| Baker | 16 | 746 | 718 | 0.95% | 48 | 15 | Township |
| Paragon | 17 | 579 | 558 | 0.7% | 2,105 | 0 | Town |
Brown is the largest city in Morgan County, with a population of 14,588.
Paragon is the smallest city in Morgan County, with a population of 579.
There are 17 cities in Morgan County, Indiana.