Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Barnes School (historical) | School | 190 | Fulton | 40 32 17 N | 090 25 02 W |
| Barnes School (historical) | School | 161 | Hamilton | 38 01 27 N | 088 41 14 W |
| Barnes School (historical) | School | 129 | Wayne | 38 33 32 N | 088 22 29 W |
| Barnet School (historical) | School | 216 | Will | 41 34 10 N | 088 00 25 W |
| Barnett | Populated Place | 163 | Madison | 38 51 16 N | 089 53 04 W |
| Barnett | Populated Place | 200 | Montgomery | 39 15 52 N | 089 41 50 W |
| Barnett Bridge | Bridge | 186 | Douglas | 39 43 45 N | 088 06 56 W |
| Barnett Cemetery | Cemetery | 224 | De Witt | 40 08 27 N | 089 04 13 W |
| Barnett Cemetery | Cemetery | 130 | Gallatin | 37 38 53 N | 088 20 22 W |
| Barnett Cemetery | Cemetery | 190 | Kankakee | 41 00 56 N | 087 50 24 W |
| Barnett Cemetery | Cemetery | 216 | Will | 41 34 20 N | 088 00 25 W |
| Barnett Hall | Building | 152 | St. Clair | 38 36 33 N | 089 49 00 W |
| Barnett Memorial Airport | Airport | 283 | Ogle | 42 02 14 N | 089 23 34 W |
| Barnett Number 1 Cemetery | Cemetery | 158 | Greene | 39 28 03 N | 090 15 24 W |
| Barnett School (historical) | School | 212 | Edgar | 39 40 13 N | 087 51 07 W |
| Barnett School (historical) | School | 217 | Knox | 40 51 40 N | 090 15 31 W |
| Barnett School (historical) | School | 236 | Warren | 40 56 40 N | 090 29 19 W |
| Barney Backup | Gut | 137 | Pike | 39 34 58 N | 091 06 57 W |
| Barney Ford | Crossing | 179 | Coles | 39 33 07 N | 088 06 07 W |
| Barney Island | Island | 223 | Lake | 42 26 37 N | 088 09 51 W |
| Barney School (historical) | School | 229 | Mercer | 41 15 13 N | 090 26 56 W |
| Barneys Prairie Church | Church | 144 | Wabash | 38 30 08 N | 087 47 49 W |
| Barnhart Cemetery | Cemetery | 191 | La Salle | 41 08 56 N | 088 49 22 W |
| Barnhart School (historical) | School | 137 | Edwards | 38 29 21 N | 088 07 19 W |
| Barnhill | Populated Place | 121 | Wayne | 38 17 04 N | 088 21 51 W |
| Barnhill Oil Field | Oilfield | 131 | Wayne | 38 17 50 N | 088 15 34 W |
| Barnhill Townhall | Building | 144 | Wayne | 38 17 58 N | 088 18 51 W |
| Barns Island | Island | 145 | Adams | 40 06 37 N | 091 29 16 W |
| Baron School (historical) | School | 193 | Iroquois | 40 57 55 N | 087 45 02 W |
| Barr | Locale | 121 | Jackson | 37 45 15 N | 089 16 00 W |
| Barr | Locale | 186 | Menard | 39 56 52 N | 089 42 00 W |
| Barr | Populated Place | 203 | Macoupin | 39 24 17 N | 090 06 15 W |
| Barr | Populated Place | 187 | Sangamon | 39 57 43 N | 089 41 49 W |
| Barr Church | Church | 155 | Marion | 38 35 27 N | 089 04 05 W |
| Barr Park | Park | 175 | Morgan | 39 44 41 N | 090 13 31 W |
| Barr School (historical) | School | 176 | Bond | 38 57 04 N | 089 27 41 W |
| Barr School (historical) | School | 155 | Marion | 38 35 27 N | 089 04 07 W |
| Barr School (historical) | School | 229 | Warren | 40 55 21 N | 090 45 58 W |
| Barr School (historical) | School | 200 | Will | 41 23 44 N | 087 59 58 W |
| Barr-Johnson Cemetery | Cemetery | 219 | Edgar | 39 30 28 N | 087 47 38 W |
| Barrall Cemetery | Cemetery | 158 | Marion | 38 31 44 N | 088 47 35 W |
| Barren Creek | Stream | | Pope | 37 15 12 N | 088 30 03 W |
| Barren School (historical) | School | 159 | Jefferson | 38 21 30 N | 088 47 10 W |
| Barren Townhall | Building | 130 | Franklin | 38 05 21 N | 088 59 40 W |
| Barrett Cemetery | Cemetery | 166 | Massac | 37 12 05 N | 088 33 15 W |
| Barrett School (historical) | School | 215 | Bureau | 41 26 38 N | 089 14 57 W |
| Barreville | Populated Place | 232 | McHenry | 42 16 32 N | 088 15 45 W |
| Barrickman Cemetery | Cemetery | 184 | Livingston | 41 02 29 N | 088 48 02 W |
| Barrie Park | Park | 190 | Cook | 41 52 11 N | 087 46 43 W |
| Barringer School (historical) | School | 169 | Union | 37 29 45 N | 089 12 20 W |
| Barrington | Populated Place | 252 | Cook | 42 09 14 N | 088 08 10 W |
| Barrington Bog Nature Preserve | Park | 243 | Lake | 42 13 10 N | 088 08 14 W |
| Barrington Center | Populated Place | 264 | Kane | 42 06 38 N | 088 11 39 W |
| Barrington Club Park | Park | 257 | Cook | 42 04 26 N | 088 08 41 W |
| Barrington High School | School | 246 | Lake | 42 09 23 N | 088 08 52 W |
| Barrington Hills | Populated Place | 258 | Cook | 42 08 41 N | 088 09 20 W |
| Barrington Hills | Populated Place | 267 | McHenry | 42 10 07 N | 088 15 27 W |
| Barrington Hills Village Hall | Building | 271 | Cook | 42 06 50 N | 088 10 54 W |
| Barrington Middle School | School | 260 | Cook | 42 09 05 N | 088 07 12 W |
| Barrington Road Pond | Lake | 240 | Cook | 42 03 20 N | 088 08 47 W |
| Barrington Shores Golf Club | Locale | 245 | Lake | 42 13 18 N | 088 09 07 W |
| Barrington Square Mall Shopping Center | Locale | 244 | Cook | 42 03 33 N | 088 08 10 W |
| Barrington Woods | Populated Place | 240 | Cook | 42 09 08 N | 088 03 21 W |
| Barritt School (historical) | School | 208 | Iroquois | 40 37 48 N | 087 52 02 W |
| Barron Cemetery | Cemetery | 278 | DeKalb | 41 59 08 N | 088 37 12 W |
| Barrow | Populated Place | 199 | Greene | 39 30 22 N | 090 24 05 W |
| Barrow Cemetery | Cemetery | 153 | Jackson | 37 55 08 N | 089 35 39 W |
| Barrows School (historical) | School | 271 | McHenry | 42 23 07 N | 088 39 44 W |
| Barry | Populated Place | 217 | Pike | 39 41 39 N | 091 02 20 W |
| Barry Balloonport | Airport | 228 | Pike | 39 41 15 N | 091 01 52 W |
| Barry Cemetery | Cemetery | 215 | Pike | 39 41 39 N | 091 02 53 W |
| Barry Elementary School | School | 186 | Cook | 41 55 58 N | 087 44 22 W |
| Barry High School | School | 220 | Pike | 39 41 50 N | 091 02 40 W |
| Barry Historic District | Park | 221 | Pike | 39 41 37 N | 091 02 27 W |
| Barry Island | Island | 149 | Grundy | 41 19 24 N | 088 33 20 W |
| Barry School (historical) | School | 156 | Grundy | 41 19 42 N | 088 32 45 W |
| Barry School (historical) | School | 232 | Henderson | 40 43 11 N | 090 48 30 W |
| Barstow | Populated Place | 175 | Rock Island | 41 31 06 N | 090 21 25 W |
| Barsumian Park | Park | 243 | Lake | 42 13 48 N | 088 09 29 W |
| Bartelso | Populated Place | 137 | Clinton | 38 32 11 N | 089 27 59 W |
| Bartelso East Oil Field | Oilfield | 135 | Clinton | 38 30 28 N | 089 23 12 W |
| Bartelso Elementary School | School | 137 | Clinton | 38 32 06 N | 089 27 57 W |
| Bartelso Oil Field | Oilfield | 145 | Clinton | 38 33 06 N | 089 27 04 W |
| Bartelso West Oil Field | Oilfield | 130 | Clinton | 38 31 42 N | 089 28 51 W |
| Barter Cemetery | Cemetery | 151 | Williamson | 37 44 58 N | 088 43 11 W |
| Barth Cemetery | Cemetery | 128 | St. Clair | 38 27 50 N | 089 46 30 W |
| Barth Cemetery | Cemetery | 127 | Wayne | 38 31 38 N | 088 19 56 W |
| Barth Cemetery | Cemetery | 132 | White | 38 07 36 N | 088 11 32 W |
| Barth Pond | Lake | 216 | DuPage | 41 47 13 N | 087 59 54 W |
| Barths Lake | Reservoir | 190 | Macoupin | 39 01 29 N | 089 56 39 W |
| Barths Lake Dam | Dam | 190 | Macoupin | 39 01 29 N | 089 56 39 W |
| Bartlett | Populated Place | 247 | Cook | 41 59 42 N | 088 11 08 W |
| Bartlett Baptist Church | Church | 239 | DuPage | 41 58 32 N | 088 12 48 W |
| Bartlett Cemetery | Cemetery | 254 | Cook | 41 59 44 N | 088 11 34 W |
| Bartlett Cemetery | Cemetery | 197 | Jackson | 37 51 51 N | 089 28 57 W |
| Bartlett Cemetery | Cemetery | 167 | Madison | 38 46 51 N | 089 53 19 W |
| Bartlett Commons Shopping Center | Locale | 244 | DuPage | 41 58 34 N | 088 12 29 W |
| Bartlett Elementary School | School | 244 | Cook | 41 59 40 N | 088 10 59 W |
| Bartlett Hills Golf and Country Club | Locale | 253 | Cook | 41 59 52 N | 088 11 51 W |
| Bartlett Orchards Shopping Center | Locale | 240 | DuPage | 41 58 22 N | 088 11 05 W |
| Bartlett Park | Park | 243 | Cook | 42 00 54 N | 088 10 55 W |
| Bartlett Park | Park | 246 | Cook | 41 59 44 N | 088 11 06 W |
| Bartlett Plaza Shopping Center | Locale | 241 | Cook | 41 59 19 N | 088 10 52 W |
| Bartlett Public Library | Building | 244 | DuPage | 41 58 37 N | 088 11 04 W |
| Bartlett School (historical) | School | 200 | Montgomery | 39 29 53 N | 089 40 57 W |
| Bartlett Village Hall | Building | 245 | Cook | 41 59 28 N | 088 11 06 W |
| Bartlett Woods Nature Preserve | Park | 267 | Lee | 41 37 10 N | 089 10 07 W |
| Bartmess Cemetery | Cemetery | 139 | Crawford | 38 55 46 N | 087 32 40 W |
| Bartmess School (historical) | School | 199 | Clark | 39 25 46 N | 087 52 26 W |
| Barton - Sommers Woodland Nature Preserve | Park | 156 | Mason | 40 07 28 N | 089 36 14 W |