3 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Hartford City | 1 | 5,849 | 6,083 | -0.66% | 1,507 | 4 | City |
| Montpelier | 2 | 1,484 | 1,537 | -0.6% | 991 | 1 | City |
| Shamrock Lakes | 3 | 213 | 222 | -0.47% | 810 | 0 | Town |
Hartford City is the largest city in Blackford County, with a population of 5,849.
Shamrock Lakes is the smallest city in Blackford County, with a population of 213.
There are 3 cities in Blackford County, Indiana.