| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Poag | city | Illinois | United States | 38.80 | -90.04 | 830 | |
| Pocahontas | city | Illinois | United States | 38.83 | -89.54 | 830 | |
| Pohaten (historical) | city | Illinois | United States | 38.44 | -87.75 | 383 | |
| Point Pleasant | city | Illinois | United States | 39.16 | -88.08 | 830 | |
| Polk | city | Illinois | United States | 41.31 | -87.61 | 830 | |
| Polo | city | Illinois | United States | 41.99 | -89.58 | 849 | |
| Polsgrove | city | Illinois | United States | 42.17 | -90.02 | 830 | |
| Pomona | city | Illinois | United States | 37.63 | -89.34 | 830 | |
| Pond | city | Illinois | United States | 37.45 | -88.83 | 830 | |
| Ponds | city | Illinois | United States | 42.18 | -88.05 | 830 | |
| Ponds At Mill Race Creek | city | Illinois | United States | 41.70 | -88.33 | 830 | |
| Ponds of Plainfield | city | Illinois | United States | 41.65 | -88.20 | 830 | |
| Ponemah | city | Illinois | United States | 40.82 | -90.71 | 830 | |
| Pontiac | city | Illinois | United States | 40.88 | -88.63 | 830 | |
| Pontiac | city | Illinois | United States | 38.59 | -89.98 | 830 | |
| Pontoon Beach | city | Illinois | United States | 38.73 | -90.08 | 416 | |
| Pontoosuc | city | Illinois | United States | 40.63 | -91.21 | 830 | |
| Poplar City | city | Illinois | United States | 40.25 | -89.94 | 830 | |
| Poplar Grove | city | Illinois | United States | 41.46 | -90.46 | 830 | |
| Poplar Grove | city | Illinois | United States | 42.37 | -88.82 | 889 | |
| Poplar Ridge | city | Illinois | United States | 41.64 | -88.10 | 830 | |
| Poplar Ridge | city | Illinois | United States | 37.70 | -89.37 | 830 | |
| Port Barrington | city | Illinois | United States | 42.24 | -88.20 | 830 | |
| Port Byron | city | Illinois | United States | 41.61 | -90.34 | 830 | |
| Port Jackson | city | Illinois | United States | 38.86 | -87.78 | 830 | |
| Portage | city | Illinois | United States | 42.38 | -90.46 | 830 | |
| Portage Park | city | Illinois | United States | 41.96 | -87.77 | 830 | |
| Porter Subdivision | city | Illinois | United States | 42.11 | -87.86 | 830 | |
| Porterfield | city | Illinois | United States | 41.08 | -89.16 | 830 | |
| Porters Glenview Subdivision | city | Illinois | United States | 42.10 | -87.85 | 830 | |
| Porterville | city | Illinois | United States | 39.09 | -87.80 | 830 | |
| Portland | city | Illinois | United States | 41.66 | -89.98 | 830 | |
| Portuguese Hill | city | Illinois | United States | 39.76 | -90.22 | 830 | |
| Posen | city | Illinois | United States | 41.63 | -87.68 | 830 | |
| Posen | city | Illinois | United States | 38.26 | -89.34 | 830 | |
| Posey | city | Illinois | United States | 38.54 | -89.35 | 830 | |
| Post Oak | city | Illinois | United States | 39.09 | -88.91 | 830 | |
| Potomac | city | Illinois | United States | 40.31 | -87.80 | 830 | |
| Pottstown | city | Illinois | United States | 40.72 | -89.66 | 830 | |
| Pottsville | city | Illinois | United States | 37.42 | -89.36 | 370 | |
| Poverty Ridge | city | Illinois | United States | 40.46 | -90.34 | 830 | |
| Poverty Row | city | Illinois | United States | 41.76 | -87.61 | 830 | |
| Powellton | city | Illinois | United States | 40.54 | -91.27 | 830 | |
| Powerton | city | Illinois | United States | 40.54 | -89.68 | 830 |