18 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Logan township | 1 | 3,662 | 3,413 | 0.52% | 165 | 22.23 | Township |
| Attica | 2 | 3,352 | 3,047 | 1.85% | 1,858 | 1.80 | City |
| Covington | 3 | 2,764 | 2,686 | 0.58% | 1,913 | 1.45 | City |
| Veedersburg | 4 | 2,078 | 2,095 | -0.14% | 694 | 3 | Town |
| Millcreek township | 5 | 1,423 | 1,397 | 0.71% | 33 | 42.71 | Township |
| Cain township | 6 | 1,115 | 1,120 | 0.18% | 28 | 39.93 | Township |
| Shawnee township | 7 | 661 | 651 | 0.76% | 19 | 34.67 | Township |
| Jackson township | 8 | 603 | 599 | 0.5% | 17 | 35.98 | Township |
| Davis township | 9 | 581 | 571 | 0.87% | 25 | 23.55 | Township |
| Kingman | 10 | 569 | 561 | 0.35% | 862 | 0.66 | Town |
| Hillsboro | 11 | 503 | 510 | -0.2% | 1,607 | 0.31 | Town |
| Newtown | 12 | 217 | 219 | 0% | 431 | 0.50 | Town |
| Foster | 13 | 176 | 101 | 7.32% | 137 | 1.29 | CDP |
| Mellott | 14 | 170 | 172 | 0% | 497 | 0.34 | Town |
| Wallace | 15 | 79 | 79 | 0% | 552 | 0.14 | Town |
| Kramer | 16 | 70 | 151 | 7.69% | 201 | 0.35 | CDP |
| Rainsville | 17 | 31 | 62 | 6.9% | 150 | 0.21 | CDP |
| Independence | 18 | 30 | 48 | 7.14% | 159 | 0.19 | CDP |
Logan township is the largest city in Fountain County, with a population of 3,662.
Independence is the smallest city in Fountain County.
There are 18 cities in Fountain County, Indiana.