Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| P A Nehring Forest Preserve | Park | 255 | DeKalb | 41 57 56 N | 088 44 13 W |
| P H Miller Elementary School | School | 200 | Kendall | 41 40 15 N | 088 32 04 W |
| P L Bolin Elementary School | School | 207 | Tazewell | 40 40 53 N | 089 32 33 W |
| P S Academy of Martial Arts | School | 237 | Peoria | 40 47 01 N | 089 36 54 W |
| Pablo Casals School | School | 184 | Cook | 41 54 15 N | 087 42 52 W |
| Pace Cemetery | Cemetery | 223 | Henry | 41 18 23 N | 089 57 14 W |
| Pace High School | School | 182 | Cook | 41 38 30 N | 087 40 41 W |
| Pacelli Hall | Building | 189 | Cook | 41 42 29 N | 087 42 56 W |
| Pacesetter Park | Park | 181 | Cook | 41 36 24 N | 087 35 15 W |
| Pacific Junction (subdivision) | Populated Place | 184 | Cook | 41 54 46 N | 087 43 14 W |
| Pacific Union School (historical) | School | 185 | Greene | 39 17 59 N | 090 30 27 W |
| Packingtown (subdivision) | Populated Place | 182 | Cook | 41 49 06 N | 087 39 37 W |
| Paddock Creek | Stream | | Madison | 38 53 22 N | 089 55 37 W |
| Paddock Family Cemetery | Cemetery | 168 | Madison | 38 55 03 N | 089 58 10 W |
| Paddock Slough | Stream | | Whiteside | 41 42 21 N | 089 53 26 W |
| Paddock Woods | Woods | 191 | Cook | 41 40 44 N | 087 49 49 W |
| Paddy Creek | Stream | | Wayne | 38 26 44 N | 088 37 46 W |
| Paddy Island | Island | 158 | Henderson | 40 42 05 N | 091 05 55 W |
| Paddy Ridge School (historical) | School | 201 | La Salle | 41 12 28 N | 088 50 12 W |
| Paderborn | Populated Place | 151 | St. Clair | 38 21 37 N | 090 02 33 W |
| Paderewski Elementary School | School | 182 | Cook | 41 51 04 N | 087 43 01 W |
| Padfield Cemetery | Cemetery | 147 | St. Clair | 38 34 13 N | 089 45 26 W |
| Padgett Cemetery | Cemetery | 201 | Adams | 39 53 39 N | 090 58 28 W |
| PADI International Instructors Training Center | School | 187 | Cook | 41 46 44 N | 087 44 57 W |
| Padon Cemetery | Cemetery | 173 | Fayette | 39 02 16 N | 088 55 08 W |
| Padua | Populated Place | 256 | McLean | 40 27 01 N | 088 45 50 W |
| Padua Residence Hall | Building | 191 | Adams | 39 56 26 N | 091 23 12 W |
| Paducah and Illinois Fishing Camp | Locale | 101 | Massac | 37 05 20 N | 088 33 27 W |
| Page A Williams Cemetery | Cemetery | 185 | Cass | 39 52 43 N | 090 06 25 W |
| Page Bridge | Bridge | 126 | Calhoun | 39 09 37 N | 090 36 49 W |
| Page Brothers Building | Building | 182 | Cook | 41 53 07 N | 087 37 39 W |
| Page Park | Park | 209 | Lee | 41 50 48 N | 089 29 37 W |
| Page Park Dam | Dam | 233 | Winnebago | 42 18 30 N | 089 09 48 W |
| Page Park School | School | 248 | Winnebago | 42 18 11 N | 089 09 13 W |
| Page Run | Stream | | Champaign | 39 59 09 N | 088 18 34 W |
| Paine School (historical) | School | 162 | Clay | 38 38 24 N | 088 40 35 W |
| Paine Webbler Tower | Building | 182 | Cook | 41 52 54 N | 087 38 00 W |
| Paineville | Populated Place | 122 | Williamson | 37 48 32 N | 089 00 06 W |
| Paint Creek | Stream | | Randolph | 38 09 33 N | 090 01 32 W |
| Paintbrush Prairie Nature Preserve | Park | 187 | Cook | 41 36 34 N | 087 42 16 W |
| Painter Creek | Stream | | Vermilion | 40 16 35 N | 087 37 37 W |
| Painter Fork | Stream | | Crawford | 38 55 00 N | 087 47 40 W |
| Painters School (historical) | School | 182 | Fulton | 40 24 56 N | 090 11 23 W |
| Paintrock Creek | Stream | | Marion | 38 30 26 N | 088 43 45 W |
| Paisley Corners | Populated Place | 183 | Bond | 38 58 53 N | 089 28 15 W |
| Pakula Building | Building | 182 | Cook | 41 52 45 N | 087 37 35 W |
| Pal-Waukee Airport | Airport | 195 | Cook | 42 06 48 N | 087 54 03 W |
| Palace Park | Park | 181 | Cook | 41 49 58 N | 087 40 00 W |
| Palatine | Populated Place | 226 | Cook | 42 06 37 N | 088 02 03 W |
| Palatine and Windsor Shopping Center | Locale | 208 | Cook | 42 06 33 N | 087 57 54 W |
| Palatine First Assembly of God Church | Church | 230 | Cook | 42 08 09 N | 088 02 10 W |
| Palatine High School | School | 227 | Cook | 42 07 57 N | 088 01 20 W |
| Palatine Hills Golf Course | Locale | 232 | Cook | 42 07 59 N | 088 03 20 W |
| Palatine Mall Shopping Center | Locale | 228 | Cook | 42 07 14 N | 088 01 56 W |
| Palatine Plaza Shopping Center | Locale | 231 | Cook | 42 07 07 N | 088 02 12 W |
| Palatine Post Office | Post Office | 230 | Cook | 42 07 00 N | 088 03 15 W |
| Palatine Prairie Nature Preserve | Park | 234 | Cook | 42 07 03 N | 088 03 37 W |
| Palatine Public Library | Building | 230 | Cook | 42 07 20 N | 088 02 14 W |
| Palatine Townhall | Building | 219 | Cook | 42 04 51 N | 088 01 30 W |
| Palbok Church | Church | 221 | Lake | 42 13 18 N | 087 58 43 W |
| Palermo | Populated Place | 217 | Edgar | 39 51 56 N | 087 52 51 W |
| Palermo Church | Church | 218 | Edgar | 39 52 10 N | 087 52 52 W |
| Palermo Post Office (historical) | Post Office | 217 | Edgar | 39 51 56 N | 087 52 50 W |
| Palestine | Populated Place | 137 | Crawford | 39 00 13 N | 087 36 46 W |
| Palestine Cemetery | Cemetery | 168 | Marion | 38 31 11 N | 088 48 32 W |
| Palestine Cemetery | Cemetery | 143 | Pope | 37 25 11 N | 088 30 49 W |
| Palestine Christian Temple | Church | 182 | Cook | 41 54 43 N | 087 41 51 W |
| Palestine Church | Church | 137 | Franklin | 38 04 17 N | 088 55 11 W |
| Palestine Church | Church | 168 | Marion | 38 31 08 N | 088 48 33 W |
| Palestine Church | Church | 146 | Pope | 37 25 11 N | 088 30 47 W |
| Palestine Church | Church | 159 | Saline | 37 37 15 N | 088 35 31 W |
| Palestine Church | Church | 182 | Williamson | 37 37 25 N | 089 03 01 W |
| Palestine Election Precinct | Civil | 172 | Randolph | 37 59 51 N | 089 49 02 W |
| Palestine Grade School | School | 137 | Crawford | 39 00 12 N | 087 36 44 W |
| Palestine High School | School | 137 | Crawford | 39 00 03 N | 087 37 19 W |
| Palestine Number 1 Cemetery | Cemetery | 117 | Gallatin | 37 53 38 N | 088 18 07 W |
| Palestine Number 2 Cemetery | Cemetery | 120 | Gallatin | 37 54 07 N | 088 18 20 W |
| Palestine Post Office | Post Office | 137 | Crawford | 39 00 09 N | 087 36 44 W |
| Palestine Public Library | Building | 137 | Crawford | 39 00 13 N | 087 36 45 W |
| Palestine School (historical) | School | 134 | Franklin | 38 03 08 N | 088 56 42 W |
| Palestine School (historical) | School | 191 | La Salle | 41 09 03 N | 088 47 52 W |
| Palestine School (historical) | School | 183 | Marion | 38 31 09 N | 088 49 45 W |
| Palestine School (historical) | School | 194 | Shelby | 39 21 38 N | 088 58 19 W |
| Palette and Chisel Academy of Fine Art | School | 180 | Cook | 41 54 00 N | 087 37 49 W |
| Palisades | Populated Place | 185 | DuPage | 41 42 49 N | 087 56 01 W |
| Palisades Country Club | Locale | 193 | Carroll | 42 10 04 N | 090 12 01 W |
| Palisades School | School | 209 | DuPage | 41 43 24 N | 087 55 36 W |
| Pallissard School (historical) | School | 194 | Kankakee | 41 01 11 N | 087 46 19 W |
| Palm Beach | Populated Place | 230 | McHenry | 42 22 36 N | 088 11 50 W |
| Palm Cemetery | Cemetery | 184 | Schuyler | 40 04 29 N | 090 38 19 W |
| Palm Garden Mobile Home Park | Populated Place | 176 | Adams | 39 54 03 N | 091 24 09 W |
| Palm School | School | 188 | Cook | 41 34 54 N | 087 39 55 W |
| Palma Lane Park | Park | 194 | Cook | 42 03 14 N | 087 47 24 W |
| Palmar School (historical) | School | 110 | Massac | 37 08 39 N | 088 33 58 W |
| Palmer | Populated Place | 190 | Christian | 39 27 28 N | 089 24 14 W |
| Palmer Airport | Airport | 205 | McDonough | 40 29 54 N | 090 34 29 W |
| Palmer Cemetery | Cemetery | 132 | Alexander | 37 15 48 N | 089 19 10 W |
| Palmer Cemetery | Cemetery | 181 | Christian | 39 27 15 N | 089 25 39 W |
| Palmer Cemetery | Cemetery | 138 | Monroe | 38 27 49 N | 090 12 56 W |
| Palmer Creek | Stream | | Monroe | 38 27 20 N | 090 16 47 W |
| Palmer Elementary School | School | 185 | Cook | 41 58 22 N | 087 44 19 W |
| Palmer House | Building | 182 | Cook | 41 52 48 N | 087 37 38 W |
| Palmer Park | Park | 191 | Cook | 41 40 01 N | 087 47 58 W |
| Palmer Park | Park | 179 | Cook | 41 41 25 N | 087 36 56 W |
| Palmer School | School | 185 | Sangamon | 39 48 20 N | 089 38 19 W |
| Palmer School (historical) | School | 145 | Bond | 38 46 15 N | 089 20 54 W |
| Palmer School (historical) | School | 205 | Henry | 41 22 05 N | 089 54 17 W |
| Palmer School (historical) | School | 217 | Lee | 41 42 51 N | 089 27 30 W |
| Palmer Square | Park | 182 | Cook | 41 55 15 N | 087 42 17 W |
| Palmerton | Populated Place | 185 | Cass | 40 00 02 N | 090 08 56 W |