| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Prairie | city | Illinois | United States | 38.17 | -89.94 | 830 | |
| Prairie Avenue Courts | city | Illinois | United States | 41.84 | -87.62 | 830 | |
| Prairie Center | city | Illinois | United States | 41.47 | -88.93 | 830 | |
| Prairie City | city | Illinois | United States | 40.62 | -90.46 | 830 | |
| Prairie Courts | city | Illinois | United States | 41.85 | -87.62 | 830 | |
| Prairie Creek | city | Illinois | United States | 42.19 | -88.06 | 830 | |
| Prairie Grove | city | Illinois | United States | 42.28 | -88.26 | 830 | |
| Prairie Hall | city | Illinois | United States | 39.75 | -88.79 | 830 | |
| Prairie Knoll | city | Illinois | United States | 41.63 | -88.23 | 830 | |
| Prairie Ponds | city | Illinois | United States | 41.64 | -88.25 | 830 | |
| Prairie Ridge | city | Illinois | United States | 41.72 | -88.15 | 830 | |
| Prairie Shores | city | Illinois | United States | 41.84 | -87.62 | 830 | |
| Prairie Trail | city | Illinois | United States | 41.56 | -88.20 | 830 | |
| Prairie View | city | Illinois | United States | 42.25 | -88.90 | 830 | |
| Prairie View | city | Illinois | United States | 42.20 | -87.96 | 830 | |
| Prairie du Rocher | city | Illinois | United States | 38.08 | -90.10 | 387 | |
| Prairietown | city | Illinois | United States | 38.97 | -89.92 | 830 | |
| Prairieview Estates | city | Illinois | United States | 41.94 | -89.14 | 830 | |
| Prairieville | city | Illinois | United States | 41.84 | -89.61 | 830 | |
| Pratt (historical) | city | Illinois | United States | 41.69 | -90.00 | 830 | |
| Preemption | city | Illinois | United States | 41.31 | -90.58 | 830 | |
| Prentice | city | Illinois | United States | 39.86 | -90.04 | 830 | |
| Prestbury | city | Illinois | United States | 41.78 | -88.42 | 830 | |
| Preston | city | Illinois | United States | 38.11 | -89.86 | 830 | |
| Preston Heights | city | Illinois | United States | 41.49 | -88.08 | 830 | |
| Prestonfield | city | Illinois | United States | 42.16 | -88.04 | 830 | |
| Prince Crossing | city | Illinois | United States | 41.91 | -88.18 | 830 | |
| Princeton | city | Illinois | United States | 41.37 | -89.46 | 830 | |
| Princeville | city | Illinois | United States | 40.93 | -89.76 | 830 | |
| Proctor | city | Illinois | United States | 40.41 | -88.40 | 830 | |
| Prophetstown | city | Illinois | United States | 41.67 | -89.94 | 830 | |
| Prospect | city | Illinois | United States | 40.32 | -88.21 | 830 | |
| Prospect Heights | city | Illinois | United States | 42.10 | -87.94 | 830 | |
| Prospect Heights Addition | city | Illinois | United States | 40.57 | -90.02 | 830 | |
| Prouty | city | Illinois | United States | 39.68 | -89.93 | 830 | |
| Providence | city | Illinois | United States | 41.28 | -89.59 | 895 | |
| Pruett | city | Illinois | United States | 39.06 | -88.91 | 830 | |
| Pryortown | city | Illinois | United States | 37.19 | -89.15 | 403 |