UpAlphabetical listing of Places in Illinois
| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|
| Peabody | city | Illinois | United States | 39.88 | -89.60 | 830 | |
| Pearl | city | Illinois | United States | 39.46 | -90.63 | 830 | |
| Pearl City | city | Illinois | United States | 42.27 | -89.83 | 830 | |
| Pebble Beach | city | Illinois | United States | 41.34 | -88.40 | 830 | |
| Pebble Creek | city | Illinois | United States | 41.62 | -87.95 | 830 | |
| Pecatonica | city | Illinois | United States | 42.31 | -89.36 | 830 | |
| Pegram | city | Illinois | United States | 39.35 | -90.40 | 830 | |
| Pekin | city | Illinois | United States | 40.57 | -89.64 | 830 | |
| Pekin Heights | city | Illinois | United States | 40.55 | -89.60 | 830 | |
| Pellville | city | Illinois | United States | 40.46 | -87.92 | 830 | |
| Penfield | city | Illinois | United States | 40.30 | -87.95 | 830 | |
| Pennington Point | city | Illinois | United States | 40.39 | -90.55 | 830 | |
| Pennock | city | Illinois | United States | 41.93 | -87.73 | 830 | |
| Penrose | city | Illinois | United States | 41.89 | -89.67 | 830 | |
| Peoria | city | Illinois | United States | 40.69 | -89.59 | 830 | |
| Peoria Heights | city | Illinois | United States | 40.75 | -89.57 | 830 | |
| Peotone | city | Illinois | United States | 41.33 | -87.79 | 830 | |
| Pepper Tree | city | Illinois | United States | 41.69 | -88.12 | 830 | |
| Pepper Tree | city | Illinois | United States | 42.14 | -88.04 | 830 | |
| Percy | city | Illinois | United States | 38.02 | -89.62 | 830 | |
| Perdueville | city | Illinois | United States | 40.47 | -88.18 | 830 | |
| Perkins (historical) | city | Illinois | United States | 37.36 | -88.65 | 390 | |
| Perks | city | Illinois | United States | 37.31 | -89.08 | 341 | |
| Perry | city | Illinois | United States | 39.78 | -90.75 | 830 | |
| Perryville | city | Illinois | United States | 42.22 | -88.98 | 830 | |
| Pershing | city | Illinois | United States | 37.88 | -88.97 | 400 | |
| Peru | city | Illinois | United States | 41.33 | -89.13 | 830 | |
| Pesotum | city | Illinois | United States | 39.91 | -88.27 | 830 | |
| Peters Creek | city | Illinois | United States | 37.49 | -88.24 | 830 | |
| Petersburg | city | Illinois | United States | 38.59 | -89.92 | 830 | |
| Petersburg | city | Illinois | United States | 40.01 | -89.85 | 830 | |
| Petersburg | city | Illinois | United States | 38.59 | -87.83 | 830 | |
| Peterstown | city | Illinois | United States | 41.50 | -89.15 | 830 | |
| Petersville | city | Illinois | United States | 41.28 | -90.94 | 830 | |
| Peterville | city | Illinois | United States | 40.22 | -89.99 | 830 | |
| Petrolia | city | Illinois | United States | 38.76 | -87.78 | 830 | |
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