| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Newton | 1 | 2,701 | 2,773 | -0.52% | 1,294 | 2 | City |
| Ste. Marie | 2 | 224 | 233 | -0.88% | 202 | 1 | Village |
| Willow Hill | 3 | 166 | 171 | -0.6% | 160 | 1 | Village |
| Hidalgo | 4 | 106 | 109 | -0.93% | 308 | 0 | Village |
| Wheeler | 5 | 96 | 94 | 0% | 167 | 1 | Village |
| Yale | 6 | 64 | 67 | -1.54% | 111 | 1 | Village |
Newton is the largest city in Jasper County, with a population of 2,701.
Yale is the smallest city in Jasper County, with a population of 64.
There are 6 cities in Jasper County, Illinois.