Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Boss Island | Island | 116 | Johnson | 37 21 42 N | 088 57 24 W |
| Boss Wilson Pond (historical) | Lake | 189 | Pike | 39 43 27 N | 090 41 24 W |
| Bosserman School (historical) | School | 221 | De Witt | 40 09 35 N | 088 44 41 W |
| Bost Hill Cemetery | Cemetery | 201 | Montgomery | 39 08 43 N | 089 20 00 W |
| Bost Hill Church | Church | 202 | Montgomery | 39 08 43 N | 089 19 58 W |
| Bost Hill School (historical) | School | 202 | Montgomery | 39 09 04 N | 089 20 27 W |
| Boster School (historical) | School | 135 | Hamilton | 38 04 53 N | 088 41 06 W |
| Bostick Cemetery | Cemetery | 187 | Jackson | 37 41 38 N | 089 20 35 W |
| Boston Bar | Bar | 97 | Alexander | 37 02 17 N | 089 13 23 W |
| Boston Bay | Bay | 158 | Mercer | 41 10 59 N | 091 00 20 W |
| Boston Chapel Christian Church | Church | 199 | Macoupin | 39 25 16 N | 089 43 11 W |
| Boston Chapel School (historical) | School | 197 | Macoupin | 39 25 16 N | 089 43 12 W |
| Boston Corners | Locale | 234 | Warren | 40 43 08 N | 090 45 34 W |
| Boston Lake | Reservoir | 170 | Marion | 38 43 43 N | 088 46 56 W |
| Bostze Mine (historical) | Mine | 201 | Henry | 41 26 35 N | 090 16 06 W |
| Bothwell Chapel | Church | 159 | St. Clair | 38 36 23 N | 089 48 57 W |
| Bothwell Conservatory of Music | School | 190 | Macoupin | 39 17 22 N | 089 52 16 W |
| Bothwell School (historical) | School | 138 | Clay | 38 41 47 N | 088 23 11 W |
| Bottenfield Elementary School | School | 227 | Champaign | 40 05 39 N | 088 15 31 W |
| Bottom Lake (historical) | Lake | 119 | St. Clair | 38 24 26 N | 089 46 04 W |
| Bottom Prairie School (historical) | School | 155 | Brown | 39 51 50 N | 090 49 39 W |
| Bottom School (historical) | School | 119 | Jackson | 37 54 28 N | 089 21 33 W |
| Bottoms School (historical) | School | 141 | Crawford | 38 53 37 N | 087 49 57 W |
| Botts Cemetery | Cemetery | 205 | Jersey | 39 00 49 N | 090 09 42 W |
| Boucher Cemetery | Cemetery | 122 | Jackson | 37 47 50 N | 089 20 37 W |
| Boughton Square Shopping Center | Locale | 221 | Will | 41 42 23 N | 088 05 10 W |
| Boujan Swale | Gut | 132 | Cass | 40 03 07 N | 090 24 38 W |
| Boulder | Populated Place | 142 | Clinton | 38 41 48 N | 089 13 32 W |
| Boulder Access Area | Locale | 139 | Clinton | 38 41 32 N | 089 14 22 W |
| Boulder Bottoms (historical) | Flat | 135 | Clinton | 38 41 28 N | 089 14 53 W |
| Boulder East Oil Field | Oilfield | 150 | Clinton | 38 40 11 N | 089 10 59 W |
| Boulder Hill | Populated Place | 204 | Kendall | 41 42 45 N | 088 20 10 W |
| Boulder Hill Elementary School | School | 202 | Kendall | 41 42 33 N | 088 20 18 W |
| Boulder Lake | Lake | 132 | Perry | 38 01 16 N | 089 25 42 W |
| Boulder Marina | Locale | 135 | Clinton | 38 41 34 N | 089 14 00 W |
| Boulder Ridge Golf Course | Locale | 262 | McHenry | 42 10 55 N | 088 21 30 W |
| Boulder School (historical) | School | 141 | Clinton | 38 43 06 N | 089 13 21 W |
| Boulevard Towers North | Building | 178 | Cook | 41 53 11 N | 087 37 25 W |
| Boulevard Towers South | Building | 178 | Cook | 41 53 09 N | 087 37 25 W |
| Bourbon | Populated Place | 203 | Douglas | 39 44 44 N | 088 22 44 W |
| Bourbon Cemetery | Cemetery | 203 | Douglas | 39 45 04 N | 088 22 37 W |
| Bourbon Post Office (historical) | Post Office | 204 | Douglas | 39 44 49 N | 088 22 43 W |
| Bourbonais (historical) | Populated Place | 209 | Bureau | 41 20 37 N | 089 38 07 W |
| Bourbonnais | Populated Place | 198 | Kankakee | 41 08 30 N | 087 52 30 W |
| Bourbonnais Geological Area Nature Preserve | Park | 195 | Kankakee | 41 08 49 N | 087 53 27 W |
| Bourbonnaise Towne Centre Shopping Center | Locale | 208 | Kankakee | 41 09 37 N | 087 53 13 W |
| Boutell Memorial Concert Hall | Building | 257 | DeKalb | 41 56 08 N | 088 45 38 W |
| Bovee Cemetery | Cemetery | 141 | Wayne | 38 23 45 N | 088 27 05 W |
| Bovee School (historical) | School | 266 | DeKalb | 41 52 40 N | 088 46 58 W |
| Bovee School (historical) | School | 139 | Wayne | 38 23 44 N | 088 27 27 W |
| Bow Wood Glen Picnic Area | Locale | 197 | Peoria | 40 49 20 N | 089 47 40 W |
| Bowen | Populated Place | 210 | Hancock | 40 14 00 N | 091 03 45 W |
| Bowen Block | Building | 181 | Cook | 41 53 05 N | 087 37 53 W |
| Bowen Cemetery | Cemetery | 201 | Bureau | 41 31 09 N | 089 39 26 W |
| Bowen Cemetery | Cemetery | 207 | Hancock | 40 13 38 N | 091 04 58 W |
| Bowen Christian Church | Church | 210 | Hancock | 40 14 01 N | 091 03 48 W |
| Bowen High School | School | 180 | Cook | 41 44 04 N | 087 33 26 W |
| Bowen Lake | Lake | 247 | Tazewell | 40 43 44 N | 089 24 55 W |
| Bowen Lake Park | Park | 246 | Tazewell | 40 43 42 N | 089 24 39 W |
| Bowen Park | Park | 193 | Lake | 42 23 20 N | 087 49 54 W |
| Bowen School (historical) | School | 247 | Bureau | 41 16 48 N | 089 50 18 W |
| Bowen School (historical) | School | 208 | Bureau | 41 31 10 N | 089 38 44 W |
| Bowens Lake | Lake | 178 | Carroll | 42 05 00 N | 090 08 40 W |
| Bower Cemetery | Cemetery | 178 | Jackson | 37 50 16 N | 089 32 15 W |
| Bower Cemetery | Cemetery | 191 | Scott | 39 33 17 N | 090 24 08 W |
| Bower Creek | Stream | | Pike | 39 47 06 N | 090 47 57 W |
| Bower Elementary School | School | 210 | DuPage | 41 48 31 N | 088 10 37 W |
| Bower Mine | Mine | 207 | Jo Daviess | 42 22 57 N | 090 23 10 W |
| Bower Park | Park | 180 | Jackson | 37 53 07 N | 089 29 28 W |
| Bower Park | Park | 147 | Richland | 38 43 47 N | 088 05 05 W |
| Bower School (historical) | School | 178 | Jackson | 37 50 20 N | 089 32 05 W |
| Bower School (historical) | School | 189 | Pike | 39 47 49 N | 090 49 32 W |
| Bowers Cemetery | Cemetery | 169 | Jasper | 39 02 00 N | 088 14 33 W |
| Bowers Pit | Mine | 169 | La Salle | 41 31 33 N | 088 41 28 W |
| Bowers-Templeman Cemetery | Cemetery | 192 | Logan | 40 04 13 N | 089 17 44 W |
| Bowes | Populated Place | 260 | Kane | 42 00 29 N | 088 23 27 W |
| Bowes Bend | Populated Place | 270 | Kane | 42 00 39 N | 088 24 53 W |
| Bowes Creek | Stream | | Kane | 41 59 24 N | 088 22 27 W |
| Bowler School (historical) | School | 208 | Pike | 39 44 35 N | 091 02 51 W |
| Bowles Lake | Lake | 141 | Mason | 40 06 52 N | 090 02 41 W |
| Bowles School (historical) | School | 190 | Adams | 40 00 06 N | 091 22 42 W |
| Bowles School (historical) | School | 165 | Fayette | 38 55 44 N | 089 11 36 W |
| Bowles Slough | Gut | 172 | Rock Island | 41 27 50 N | 090 25 21 W |
| Bowlesburg Cemetery | Cemetery | 206 | Rock Island | 41 28 30 N | 090 24 49 W |
| Bowlesburg Elementary School | School | 214 | Rock Island | 41 29 10 N | 090 24 52 W |
| Bowlesville (historical) | Populated Place | 128 | Gallatin | 37 40 27 N | 088 12 45 W |
| Bowling Cemetery | Cemetery | 120 | White | 38 04 25 N | 088 05 01 W |
| Bowling Green (historical) | Populated Place | 230 | Woodford | 40 39 47 N | 089 10 22 W |
| Bowling Green Hill | Summit | 205 | Fayette | 39 10 30 N | 089 00 26 W |
| Bowling Green School (historical) | School | 177 | Fayette | 39 10 59 N | 089 00 35 W |
| Bowling Green Townhall | Building | 168 | Fayette | 39 12 06 N | 088 56 41 W |
| Bowman (historical) | Populated Place | 160 | Jersey | 39 08 15 N | 090 14 40 W |
| Bowman Avenue Church of God | Church | 183 | Vermilion | 40 07 41 N | 087 36 43 W |
| Bowman Avenue United Methodist Church | Church | 193 | Vermilion | 40 08 23 N | 087 36 41 W |
| Bowman Bend | Bend | 110 | White | 38 04 18 N | 087 58 28 W |
| Bowman Cemetery | Cemetery | 211 | Brown | 39 51 31 N | 090 54 53 W |
| Bowman Cemetery | Cemetery | 197 | Henry | 41 33 46 N | 090 04 26 W |
| Bowman Cemetery | Cemetery | 202 | McDonough | 40 18 04 N | 090 37 53 W |
| Bowman Corporate Center | Locale | 212 | Kane | 41 47 29 N | 088 21 44 W |
| Bowman Ford | Crossing | 159 | Cumberland | 39 15 58 N | 088 09 38 W |
| Bowman Pond | Lake | 123 | St. Clair | 38 25 30 N | 089 51 04 W |
| Bowman School (historical) | School | 147 | Clinton | 38 34 33 N | 089 09 02 W |
| Bowman School (historical) | School | 149 | Mason | 40 15 38 N | 090 02 15 W |
| Bowman School (historical) | School | 219 | McLean | 40 44 26 N | 088 45 32 W |
| Bowmanville (subdivision) | Populated Place | 182 | Cook | 41 58 21 N | 087 41 36 W |
| Bowmanville Baptist Church | Church | 188 | Cook | 41 58 40 N | 087 41 33 W |
| Bowser School (historical) | School | 222 | Montgomery | 39 16 31 N | 089 15 02 W |
| Boxelder School (historical) | School | 138 | Cass | 40 02 24 N | 090 13 59 W |
| Boxelder School (historical) | School | 216 | Cook | 42 01 01 N | 087 59 23 W |
| Boxtown School (historical) | School | 118 | Monroe | 38 06 38 N | 090 10 03 W |