5 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Ida Grove | 1 | 1,944 | 2,058 | -1.17% | 885 | 2.20 | City |
| Holstein | 2 | 1,455 | 1,504 | -0.68% | 923 | 1.58 | City |
| Battle Creek | 3 | 673 | 703 | -0.88% | 1,177 | 0.57 | City |
| Galva | 4 | 405 | 434 | -1.46% | 537 | 0.75 | City |
| Arthur | 5 | 212 | 222 | -0.93% | 1,442 | 0.15 | City |
Ida Grove is the largest city in Ida County, with a population of 1,944.
Arthur is the smallest city in Ida County.
There are 5 cities in Ida County, Iowa.