Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Providence Church (historical) | Church | 137 | Wayne | 38 31 06 N | 088 11 46 W |
| Providence High School | School | 188 | Will | 41 31 16 N | 088 00 02 W |
| Providence of God Roman Catholic Church | Church | 181 | Cook | 41 51 26 N | 087 38 43 W |
| Providence School | School | 183 | Cook | 41 52 45 N | 087 42 54 W |
| Providence School (historical) | School | 187 | Cass | 39 55 03 N | 090 16 04 W |
| Providence School (historical) | School | 186 | Hancock | 40 18 18 N | 091 00 20 W |
| Providence School (historical) | School | 201 | Morgan | 39 35 23 N | 090 06 05 W |
| Providence School (historical) | School | 192 | Sangamon | 39 37 10 N | 089 53 57 W |
| Provident Medical Center | Hospital | 183 | Cook | 41 48 09 N | 087 36 52 W |
| Proviso East High School | School | 190 | Cook | 41 52 49 N | 087 49 59 W |
| Proviso School | School | 191 | Cook | 41 52 23 N | 087 50 43 W |
| Proviso West High School | School | 199 | Cook | 41 52 04 N | 087 54 00 W |
| Provo Cemetery | Cemetery | 114 | Alexander | 37 15 58 N | 089 16 21 W |
| Prudential Building | Building | 178 | Cook | 41 53 07 N | 087 37 23 W |
| Pruett | Populated Place | 181 | Fayette | 39 03 53 N | 088 54 39 W |
| Pruett Branch | Stream | | Saline | 37 39 18 N | 088 22 54 W |
| Pruitt Cemetery | Cemetery | 162 | Jersey | 39 10 45 N | 090 14 34 W |
| Pruitt Cemetery | Cemetery | 188 | McDonough | 40 17 48 N | 090 43 47 W |
| Pruitt Cemetery | Cemetery | 133 | Wayne | 38 35 38 N | 088 26 47 W |
| Prunty Cemetery | Cemetery | 170 | Schuyler | 40 08 13 N | 090 48 22 W |
| Prussing Elementary School | School | 189 | Cook | 41 57 57 N | 087 46 22 W |
| Pryor Cemetery | Cemetery | 204 | Edgar | 39 36 31 N | 087 35 07 W |
| Pryor School (historical) | School | 189 | Adams | 40 10 06 N | 091 15 31 W |
| Pryortown | Populated Place | 132 | Pulaski | 37 11 25 N | 089 08 55 W |
| Public Art Workshop | School | 188 | Cook | 41 52 47 N | 087 46 01 W |
| Public Hospital of the Town of Salem | Hospital | 168 | Marion | 38 38 29 N | 088 56 55 W |
| Public Square | Park | 162 | Edwards | 38 22 40 N | 088 03 26 W |
| Public Square | Park | 202 | Jersey | 39 07 08 N | 090 19 45 W |
| Public Square | Park | 189 | Macoupin | 39 16 47 N | 089 52 53 W |
| Public Square | Park | 156 | Madison | 38 53 39 N | 090 10 57 W |
| Public Square | Park | 206 | Schuyler | 40 07 17 N | 090 33 47 W |
| Public Square | Park | 204 | Vermilion | 39 58 31 N | 087 38 08 W |
| Public Square | Park | 232 | Warren | 40 54 43 N | 090 38 54 W |
| Puckett Cemetery | Cemetery | 134 | Wayne | 38 16 27 N | 088 18 49 W |
| Puckett School (historical) | School | 298 | Jo Daviess | 42 26 39 N | 089 59 05 W |
| Puddle Pond | Reservoir | 183 | Will | 41 34 30 N | 088 13 18 W |
| Puddle Pond Dam | Dam | 183 | Will | 41 34 30 N | 088 13 18 W |
| Puder | Populated Place | 209 | Kankakee | 41 14 42 N | 087 36 24 W |
| Puerto Rican High School | School | 182 | Cook | 41 54 44 N | 087 41 09 W |
| Pugh School | School | 206 | Macon | 39 51 16 N | 088 57 52 W |
| Pulaski | Populated Place | 206 | Hancock | 40 12 09 N | 090 56 28 W |
| Pulaski | Populated Place | 105 | Pulaski | 37 12 49 N | 089 12 21 W |
| Pulaski Cemetery | Cemetery | 207 | Hancock | 40 12 10 N | 090 56 28 W |
| Pulaski Community Academy | School | 181 | Cook | 41 55 07 N | 087 41 01 W |
| Pulaski County | Civil | 135 | Pulaski | 37 13 00 N | 089 09 00 W |
| Pulaski Election Precinct | Civil | 104 | Pulaski | 37 13 04 N | 089 12 02 W |
| Pulaski Park | Park | 182 | Cook | 41 54 22 N | 087 39 48 W |
| Pulaski Park | Park | 174 | La Salle | 41 20 01 N | 089 05 28 W |
| Pulaski School (historical) | School | 208 | Adams | 40 11 35 N | 090 56 26 W |
| Pulaski Slough | Stream | | Pulaski | 37 10 49 N | 089 15 23 W |
| Pulaski Woods | Woods | 209 | Cook | 41 42 37 N | 087 53 36 W |
| Pulley Cemetery | Cemetery | 141 | Williamson | 37 44 43 N | 088 49 56 W |
| Pulleys Mill | Locale | 182 | Williamson | 37 36 00 N | 088 58 46 W |
| Pulleys Mill Pentecostal Church | Church | 180 | Williamson | 37 35 58 N | 088 58 52 W |
| Pullhall School (historical) | School | 193 | Sangamon | 39 35 18 N | 089 47 14 W |
| Pulliam Airport | Airport | 203 | Livingston | 40 59 10 N | 088 40 00 W |
| Pulliam Cemetery | Cemetery | 207 | Macoupin | 39 31 00 N | 089 58 58 W |
| Pulliam Cemetery | Cemetery | 123 | St. Clair | 38 22 23 N | 089 47 30 W |
| Pullman | Populated Place | 180 | Cook | 41 41 34 N | 087 36 21 W |
| Pullman Administration Building | Building | 181 | Cook | 41 41 37 N | 087 36 31 W |
| Pullman Christian Reformed Church | Church | 182 | Cook | 41 42 26 N | 087 36 46 W |
| Pullman Elementary School | School | 179 | Cook | 41 41 19 N | 087 36 31 W |
| Pullman Market Hall (historical) | Building | 180 | Cook | 41 41 27 N | 087 36 25 W |
| Pullman Park | Park | 180 | Cook | 41 41 29 N | 087 36 31 W |
| Pullman Presbyterian Church | Church | 182 | Cook | 41 41 59 N | 087 36 50 W |
| Pullman Stables | Building | 182 | Cook | 41 41 25 N | 087 36 36 W |
| Pullman United Methodist Church | Church | 180 | Cook | 41 41 26 N | 087 36 28 W |
| Pulltight School (historical) | School | 207 | Coles | 39 39 08 N | 088 15 51 W |
| Pulltight School (historical) | School | 202 | Moultrie | 39 39 48 N | 088 41 25 W |
| Pulte Park | Park | 215 | Cook | 41 37 20 N | 087 50 23 W |
| Puncheon Creek | Stream | | Jefferson | 38 11 09 N | 089 09 12 W |
| Puncheon Creek | Stream | | Wayne | 38 22 34 N | 088 40 57 W |
| Purcell School (historical) | School | 170 | Madison | 38 51 31 N | 089 40 44 W |
| Purdue Cemetery | Cemetery | 166 | Marion | 38 30 42 N | 088 52 59 W |
| Purdy School (historical) | School | 125 | Perry | 37 58 21 N | 089 13 10 W |
| Pure Gold School (historical) | School | 141 | Wayne | 38 25 02 N | 088 27 19 W |
| Pure in Heart Missionary Baptist Church | Church | 185 | Cook | 41 44 11 N | 087 38 43 W |
| Pure in Heart Missionary Baptist Church | Church | 185 | Cook | 41 41 12 N | 087 37 50 W |
| Pureton | Populated Place | 153 | Richland | 38 43 50 N | 088 13 28 W |
| Purington Lakes | Reservoir | 217 | Knox | 40 56 36 N | 090 18 15 W |
| Purpus Creek | Stream | | Brown | 39 55 07 N | 090 54 17 W |
| Pursley Cemetery | Cemetery | 193 | Pike | 39 39 07 N | 090 57 12 W |
| Purvis Cemetery | Cemetery | 185 | Moultrie | 39 34 19 N | 088 33 24 W |
| Purvis School (historical) | School | 195 | Moultrie | 39 35 13 N | 088 33 55 W |
| Put Creek | Stream | | Fulton | 40 31 34 N | 090 19 06 W |
| Put School (historical) | School | 227 | Ford | 40 26 53 N | 088 09 22 W |
| Puterbaugh School (historical) | School | 134 | Tazewell | 40 31 27 N | 089 50 11 W |
| Putman School (historical) | School | 256 | Winnebago | 42 29 00 N | 089 22 57 W |
| Putnam | Populated Place | 158 | Putnam | 41 11 06 N | 089 23 47 W |
| Putnam (historical) | Locale | 260 | Lake | 42 10 32 N | 088 04 20 W |
| Putnam Cemetery | Cemetery | 196 | Brown | 39 56 54 N | 090 42 11 W |
| Putnam Cemetery | Cemetery | 161 | Putnam | 41 11 07 N | 089 23 24 W |
| Putnam County | Civil | 185 | Putnam | 41 12 00 N | 089 17 00 W |
| Putnam County Courthouse | Building | 154 | Putnam | 41 15 12 N | 089 20 33 W |
| Putnam County Elementary School-Hennepin Building | School | 154 | Putnam | 41 14 58 N | 089 20 35 W |
| Putnam County Elementary School-Hopkins Building | School | 210 | Putnam | 41 15 56 N | 089 13 21 W |
| Putnam County Farm (historical) | Locale | 211 | Putnam | 41 15 36 N | 089 16 52 W |
| Putnam County High School | School | 207 | Putnam | 41 15 57 N | 089 13 03 W |
| Putnam County Junior High School | School | 200 | Putnam | 41 09 12 N | 089 13 03 W |
| Putnam Post Office | Post Office | 158 | Putnam | 41 11 05 N | 089 23 50 W |
| Putneys Landing | Locale | 162 | Henderson | 41 01 54 N | 090 55 53 W |
| Putnman Cemetery | Cemetery | 162 | Putnam | 41 11 08 N | 089 23 24 W |
| Pyatts | Populated Place | 127 | Perry | 38 00 11 N | 089 22 16 W |
| Pyle Cemetery | Cemetery | 183 | Hardin | 37 34 10 N | 088 19 18 W |
| Pyles Cemetery | Cemetery | 180 | Hardin | 37 34 27 N | 088 19 33 W |
| Pyramid | Populated Place | 171 | Washington | 38 20 03 N | 089 13 40 W |
| Pyramid Park | Park | 130 | Williamson | 37 42 57 N | 088 56 19 W |
| Pyramid State Park | Park | 137 | Perry | 38 01 05 N | 089 24 52 W |
| Pyrtle School (historical) | School | 130 | Hamilton | 38 01 30 N | 088 34 35 W |
| Q Ditch | Canal | 104 | Massac | 37 15 16 N | 088 49 49 W |