Towns
| State | City/Town | Town Title |
|---|---|---|
| Illinois | Papineau | Papineau, IL |
| Illinois | Paris | Paris, IL |
| Illinois | Park Forest | Park Forest, IL |
| Illinois | Park Ridge | Park Ridge, IL |
| Illinois | Parkersburg | Parkersburg, IL |
| Illinois | Patoka | Patoka, IL |
| Illinois | Patterson | Patterson, IL |
| Illinois | Paw Paw | Paw Paw, IL |
| Illinois | Pawnee | Pawnee, IL |
| Illinois | Paxton | Paxton, IL |
| Illinois | Payson | Payson, IL |
| Illinois | Pearl | Pearl, IL |
| Illinois | Pearl City | Pearl City, IL |
| Illinois | Pecatonica | Pecatonica, IL |
| Illinois | Pekin | Pekin, IL |
| Illinois | Penfield | Penfield, IL |
| Illinois | Peoria | Peoria, IL |
| Illinois | Peoria Heights | Peoria Heights, IL |
| Illinois | Peotone | Peotone, IL |
| Illinois | Percy | Percy, IL |
| Illinois | Perks | Perks, IL |
| Illinois | Perry | Perry, IL |
| Illinois | Peru | Peru, IL |
| Illinois | Pesotum | Pesotum, IL |
| Illinois | Petersburg | Petersburg, IL |