18 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Logan | 1 | 3,678 | 3,418 | 0.91% | 165 | 22 | Township |
| Attica | 2 | 3,295 | 3,052 | 1.48% | 1,826 | 2 | City |
| Covington | 3 | 2,767 | 2,684 | 0.58% | 1,915 | 1 | City |
| Veedersburg | 4 | 2,096 | 2,095 | 0% | 700 | 3 | Town |
| Millcreek | 5 | 1,425 | 1,396 | 1.06% | 33 | 43 | Township |
| Cain | 6 | 1,132 | 1,120 | 0.89% | 28 | 40 | Township |
| Shawnee | 7 | 650 | 647 | 0.46% | 19 | 35 | Township |
| Jackson | 8 | 607 | 600 | 1% | 17 | 36 | Township |
| Davis | 9 | 581 | 571 | 1.22% | 25 | 24 | Township |
| Kingman | 10 | 566 | 560 | 0.18% | 858 | 1 | Town |
| Hillsboro | 11 | 508 | 510 | -0.2% | 1,623 | 0 | Town |
| Newtown | 12 | 219 | 219 | 0% | 435 | 1 | Town |
| Foster | 13 | 176 | 101 | 7.32% | 137 | 1 | CDP |
| Mellott | 14 | 175 | 173 | 0% | 512 | 0 | Town |
| Wallace | 15 | 81 | 81 | 0% | 566 | 0 | Town |
| Kramer | 16 | 70 | 151 | 7.69% | 201 | 0 | CDP |
| Rainsville | 17 | 31 | 62 | 6.9% | 150 | 0 | CDP |
| Independence | 18 | 30 | 48 | 7.14% | 159 | 0 | CDP |
Logan is the largest city in Fountain County, with a population of 3,678.
Independence is the smallest city in Fountain County, with a population of 30.
There are 18 cities in Fountain County, Indiana.