| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Hartford City | 1 | 5,864 | 6,081 | -0.58% | 1,511 | 4 | City |
| Montpelier | 2 | 1,480 | 1,536 | -0.6% | 989 | 1 | City |
| Shamrock Lakes | 3 | 213 | 222 | -0.93% | 810 | 0 | Town |
Hartford City is the largest city in Blackford County, with a population of 5,864.
Shamrock Lakes is the smallest city in Blackford County, with a population of 213.
There are 3 cities in Blackford County, Indiana.