19 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Wade township | 1 | 4,308 | 4,380 | -0.32% | 58 | 73.96 | Township |
| Newton | 2 | 2,726 | 2,768 | -0.29% | 1,306 | 2.09 | City |
| North Muddy township | 3 | 755 | 767 | -0.26% | 15 | 51.05 | Township |
| Crooked Creek township | 4 | 662 | 672 | -0.3% | 12 | 55.91 | Township |
| Grove township | 5 | 582 | 592 | -0.34% | 12 | 49.41 | Township |
| Ste. Marie township | 6 | 511 | 517 | 0% | 12 | 43.31 | Township |
| Willow Hill township | 7 | 509 | 518 | -0.39% | 15 | 34.14 | Township |
| Fox township | 8 | 429 | 438 | -0.46% | 11 | 40.43 | Township |
| Smallwood township | 9 | 427 | 436 | -0.23% | 10 | 41.67 | Township |
| Newton township | 10 | 422 | 427 | 0% | 12 | 35.71 | Township |
| Grandville township | 11 | 345 | 345 | 0.29% | 9 | 36.99 | Township |
| South Muddy township | 12 | 308 | 319 | -0.96% | 9 | 35.71 | Township |
| Hunt City township | 13 | 252 | 257 | -0.4% | 8 | 32.03 | Township |
| Ste. Marie | 14 | 226 | 233 | -0.44% | 204 | 1.11 | Village |
| Willow Hill | 15 | 166 | 170 | -0.6% | 160 | 1.04 | Village |
| Hidalgo | 16 | 107 | 109 | 0% | 311 | 0.34 | Village |
| Wheeler | 17 | 98 | 95 | 1.03% | 170 | 0.58 | Village |
| West Liberty | 18 | 86 | 192 | 7.5% | 168 | 0.51 | CDP |
| Yale | 19 | 65 | 67 | 0% | 113 | 0.57 | Village |
Wade township is the largest city in Jasper County, with a population of 4,308.
Yale is the smallest city in Jasper County.
There are 19 cities in Jasper County, Illinois.