| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Placerdale | city | Illinois | United States | 41.68 | -87.65 | 830 | |
| Plainfield | city | Illinois | United States | 39.10 | -88.14 | 830 | |
| Plainfield | city | Illinois | United States | 41.63 | -88.20 | 830 | |
| Plainsman Terrace | city | Illinois | United States | 41.58 | -88.20 | 830 | |
| Plainview | city | Illinois | United States | 39.16 | -89.99 | 830 | |
| Plainville | city | Illinois | United States | 39.79 | -91.19 | 830 | |
| Plano | city | Illinois | United States | 41.66 | -88.54 | 830 | |
| Plantation | city | Illinois | United States | 41.68 | -88.20 | 830 | |
| Plato Center | city | Illinois | United States | 42.03 | -88.43 | 921 | |
| Plato Corners | city | Illinois | United States | 41.99 | -88.41 | 862 | |
| Plattville | city | Illinois | United States | 41.53 | -88.38 | 830 | |
| Pleak | city | Illinois | United States | 39.60 | -88.94 | 830 | |
| Pleasant Grove | city | Illinois | United States | 37.44 | -89.03 | 396 | |
| Pleasant Hill | city | Illinois | United States | 39.44 | -90.87 | 830 | |
| Pleasant Hill | city | Illinois | United States | 40.61 | -88.75 | 830 | |
| Pleasant Hill (historical) | city | Illinois | United States | 42.27 | -90.24 | 889 | |
| Pleasant Knoll | city | Illinois | United States | 41.55 | -88.15 | 830 | |
| Pleasant Mound | city | Illinois | United States | 38.86 | -89.29 | 830 | |
| Pleasant Plains | city | Illinois | United States | 39.87 | -89.92 | 830 | |
| Pleasant Ridge | city | Illinois | United States | 38.72 | -89.98 | 830 | |
| Pleasant Ridge (historical) | city | Illinois | United States | 40.69 | -90.36 | 830 | |
| Pleasant Valley | city | Illinois | United States | 42.23 | -90.03 | 830 | |
| Pleasant View | city | Illinois | United States | 40.10 | -90.46 | 830 | |
| Plum Grove Village | city | Illinois | United States | 42.09 | -88.04 | 830 | |
| Plum Hill | city | Illinois | United States | 38.36 | -89.51 | 830 | |
| Plumfield | city | Illinois | United States | 37.89 | -89.01 | 416 | |
| Plymouth | city | Illinois | United States | 40.29 | -90.92 | 830 |