6 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Newton | 1 | 2,698 | 2,770 | -0.44% | 1,292 | 2 | City |
| Ste. Marie | 2 | 225 | 233 | -0.44% | 203 | 1 | Village |
| Willow Hill | 3 | 167 | 170 | 0% | 161 | 1 | Village |
| Hidalgo | 4 | 107 | 109 | 0% | 311 | 0 | Village |
| Wheeler | 5 | 97 | 96 | 0% | 168 | 1 | Village |
| Yale | 6 | 65 | 67 | 0% | 113 | 1 | Village |
Newton is the largest city in Jasper County, with a population of 2,698.
Yale is the smallest city in Jasper County, with a population of 65.
There are 6 cities in Jasper County, Illinois.