15 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Muncie | 1 | 65,063 | 65,107 | -0.01% | 2,374 | 27.40 | City |
| Center township | 2 | 64,349 | 64,460 | -0.09% | 1,866 | 34.48 | Township |
| Yorktown | 3 | 11,878 | 11,532 | 0.58% | 372 | 31.93 | Town |
| Harrison township | 4 | 3,553 | 3,468 | 0.65% | 84 | 42.29 | Township |
| Delaware township | 5 | 3,505 | 3,476 | 0.2% | 120 | 29.29 | Township |
| Union township | 6 | 2,554 | 2,532 | 0.24% | 87 | 29.34 | Township |
| Chesterfield | 7 | 2,509 | 2,489 | 0.16% | 1,833 | 1.37 | Town |
| Albany | 8 | 2,277 | 2,289 | -0.09% | 1,149 | 1.98 | Town |
| Daleville | 9 | 1,736 | 1,650 | 0.99% | 816 | 2.13 | Town |
| Eaton | 10 | 1,588 | 1,593 | -0.06% | 426 | 3.73 | Town |
| Perry township | 11 | 1,556 | 1,500 | 0.91% | 55 | 28.24 | Township |
| Niles township | 12 | 1,394 | 1,366 | 0.5% | 47 | 29.49 | Township |
| Gaston | 13 | 802 | 797 | 0.12% | 2,203 | 0.36 | Town |
| Selma | 14 | 736 | 746 | -0.27% | 822 | 0.90 | Town |
| Blountsville | 15 | 97 | 97 | 0% | 858 | 0.11 | Town |
Muncie is the largest city in Delaware County, with a population of 65,063.
Blountsville is the smallest city in Delaware County.
There are 15 cities in Delaware County, Indiana.