| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Pacific Junction | city | Illinois | United States | 41.91 | -87.72 | 830 | |
| Packingtown | city | Illinois | United States | 41.82 | -87.66 | 830 | |
| Paderborn | city | Illinois | United States | 38.36 | -90.04 | 830 | |
| Padua | city | Illinois | United States | 40.45 | -88.76 | 846 | |
| Paineville | city | Illinois | United States | 37.81 | -89.00 | 403 | |
| Paisley Corners | city | Illinois | United States | 38.98 | -89.47 | 830 | |
| Palatinas | city | Illinois | United States | 42.11 | -88.03 | 830 | |
| Palatine | city | Illinois | United States | 42.11 | -88.03 | 830 | |
| Palermo | city | Illinois | United States | 39.87 | -87.88 | 830 | |
| Palestine | city | Illinois | United States | 39.00 | -87.61 | 830 | |
| Palisades | city | Illinois | United States | 41.71 | -87.93 | 830 | |
| Palm Beach | city | Illinois | United States | 42.38 | -88.20 | 830 | |
| Palm Garden Mobile Home Park | city | Illinois | United States | 39.90 | -91.40 | 830 | |
| Palmer | city | Illinois | United States | 39.46 | -89.40 | 830 | |
| Palmerton | city | Illinois | United States | 40.00 | -90.15 | 830 | |
| Palmyra | city | Illinois | United States | 39.43 | -90.00 | 830 | |
| Palmyra | city | Illinois | United States | 41.85 | -89.58 | 830 | |
| Paloma | city | Illinois | United States | 40.02 | -91.20 | 830 | |
| Palos Heights | city | Illinois | United States | 41.67 | -87.80 | 830 | |
| Palos Hills | city | Illinois | United States | 41.70 | -87.82 | 830 | |
| Palos Park | city | Illinois | United States | 41.67 | -87.83 | 830 | |
| Palzo | city | Illinois | United States | 37.65 | -88.76 | 830 | |
| Pana | city | Illinois | United States | 39.39 | -89.08 | 830 | |
| Panama | city | Illinois | United States | 39.03 | -89.52 | 830 | |
| Pankeyville | city | Illinois | United States | 37.71 | -88.54 | 377 | |
| Panola | city | Illinois | United States | 40.78 | -89.02 | 830 | |
| Panorama Hills | city | Illinois | United States | 38.72 | -89.29 | 830 | |
| Panorama Valley | city | Illinois | United States | 42.23 | -88.99 | 830 | |
| Papineau | city | Illinois | United States | 40.97 | -87.72 | 830 | |
| Paradise | city | Illinois | United States | 39.41 | -88.44 | 830 | |
| Paradise Acres Manufactured Home Community | city | Illinois | United States | 37.77 | -89.12 | 830 | |
| Paris | city | Illinois | United States | 39.61 | -87.70 | 830 | |
| Park City | city | Illinois | United States | 42.35 | -87.88 | 830 | |
| Park Estates Mobile Home Park | city | Illinois | United States | 38.11 | -89.71 | 830 | |
| Park Forest | city | Illinois | United States | 41.49 | -87.67 | 830 | |
| Park Hill | city | Illinois | United States | 42.16 | -88.10 | 892 | |
| Park Manor | city | Illinois | United States | 39.39 | -89.07 | 830 | |
| Park Manor | city | Illinois | United States | 41.77 | -87.62 | 830 | |
| Park Meadowlands West Mobile Home Court | city | Illinois | United States | 42.30 | -88.89 | 839 | |
| Park Place | city | Illinois | United States | 41.70 | -88.36 | 830 | |
| Park Place | city | Illinois | United States | 41.59 | -88.22 | 830 | |
| Park Place Estates of Northbrook | city | Illinois | United States | 42.12 | -87.81 | 830 | |
| Park Ridge | city | Illinois | United States | 42.01 | -87.84 | 830 | |
| Park Row | city | Illinois | United States | 41.87 | -87.62 | 830 | |
| Parker | city | Illinois | United States | 37.57 | -88.80 | 830 | |
| Parkersburg | city | Illinois | United States | 38.59 | -88.06 | 830 | |
| Parkland | city | Illinois | United States | 40.46 | -89.75 | 830 | |
| Parkside | city | Illinois | United States | 41.77 | -87.58 | 830 | |
| Parkview | city | Illinois | United States | 39.81 | -88.29 | 830 | |
| Parkville | city | Illinois | United States | 39.89 | -88.36 | 830 | |
| Parnell | city | Illinois | United States | 40.22 | -88.72 | 830 | |
| Parrish | city | Illinois | United States | 37.94 | -88.81 | 830 | |
| Pasfield | city | Illinois | United States | 39.78 | -89.83 | 830 | |
| Passport | city | Illinois | United States | 38.79 | -88.24 | 830 | |
| Patoka | city | Illinois | United States | 38.76 | -89.10 | 830 | |
| Patterson | city | Illinois | United States | 39.48 | -90.48 | 830 | |
| Patterson Springs | city | Illinois | United States | 39.79 | -88.19 | 830 | |
| Patton | city | Illinois | United States | 39.48 | -87.56 | 830 | |
| Patton | city | Illinois | United States | 38.48 | -87.75 | 390 | |
| Pattonsburg | city | Illinois | United States | 40.94 | -89.18 | 830 | |
| Pauline | city | Illinois | United States | 40.13 | -88.01 | 830 | |
| Pauls Friendly City Mobile Home Park | city | Illinois | United States | 38.88 | -89.39 | 830 | |
| Paulton | city | Illinois | United States | 37.76 | -88.80 | 830 | |
| Pavillion | city | Illinois | United States | 41.61 | -88.48 | 830 | |
| Pavinita | city | Illinois | United States | 41.62 | -87.96 | 830 | |
| Paw Paw | city | Illinois | United States | 41.69 | -88.98 | 941 | |
| Pawnee | city | Illinois | United States | 39.59 | -89.58 | 830 | |
| Pawnee Junction | city | Illinois | United States | 39.59 | -89.65 | 830 | |
| Paxton | city | Illinois | United States | 40.46 | -88.10 | 830 | |
| Paynes Point | city | Illinois | United States | 42.02 | -89.21 | 875 | |
| Payson | city | Illinois | United States | 39.82 | -91.24 | 830 | |
| Paytonville | city | Illinois | United States | 41.34 | -88.43 | 830 |