Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Bohm Cemetery | Cemetery | 288 | Appanoose | 40 50 00 N | 092 57 01 W |
| Boies | Populated Place | 291 | Black Hawk | 42 36 52 N | 092 22 38 W |
| Boies Bend County Park | Park | 285 | Buchanan | 42 23 35 N | 091 47 31 W |
| Boies Post Office (historical) | Post Office | 286 | Black Hawk | 42 36 52 N | 092 22 51 W |
| Bois d'Arc | Locale | 292 | Black Hawk | 42 24 56 N | 092 32 16 W |
| Bois D'Arc Post Office (historical) | Post Office | 297 | Grundy | 42 24 20 N | 092 32 21 W |
| Boji Bay Water Park | Park | 435 | Dickinson | 43 20 15 N | 095 09 01 W |
| Bolan | Populated Place | 374 | Worth | 43 22 19 N | 093 07 10 W |
| Bolan (historical) | Locale | 374 | Worth | 43 22 20 N | 093 07 06 W |
| Bolan Post Office (historical) | Post Office | 374 | Worth | 43 22 19 N | 093 07 10 W |
| Boles Cemetery | Cemetery | 246 | Mahaska | 41 13 48 N | 092 47 39 W |
| Boley Farm Cemetery | Cemetery | 376 | Adair | 41 15 10 N | 094 20 01 W |
| Boley Incorporated Elevator | Locale | 192 | Van Buren | 40 44 05 N | 091 57 39 W |
| Bollman Cemetery | Cemetery | 317 | Wayne | 40 42 55 N | 093 12 36 W |
| Bolser Park | Park | 381 | Plymouth | 42 47 25 N | 096 09 29 W |
| Bolsinger Cemetery | Cemetery | 362 | Clayton | 42 40 40 N | 091 08 31 W |
| Bolstad Wildlife Area | Park | 389 | Winnebago | 43 26 50 N | 093 32 34 W |
| Bolstead School (historical) | School | 398 | Emmet | 43 23 53 N | 094 49 16 W |
| Bolt Family Burying Ground | Cemetery | 317 | Montgomery | 41 02 10 N | 094 59 41 W |
| Bolton | Populated Place | 216 | Mahaska | 41 15 31 N | 092 44 10 W |
| Bolton Cemetery | Cemetery | 236 | Cedar | 41 44 00 N | 091 05 01 W |
| Bolton School | Locale | 235 | Cedar | 41 43 42 N | 091 05 03 W |
| Boltonville | Locale | 255 | Iowa | 41 42 06 N | 091 52 16 W |
| Boltonville Post Office (historical) | Post Office | 255 | Iowa | 41 42 06 N | 091 52 16 W |
| Bon Accord | Locale | 212 | Johnson | 41 33 26 N | 091 35 06 W |
| Bon Accord Post Office (historical) | Post Office | 212 | Johnson | 41 33 26 N | 091 35 06 W |
| Bon-Aire Mobile Home Lodge | Populated Place | 209 | Johnson | 41 37 45 N | 091 29 41 W |
| Bonair | Populated Place | 400 | Howard | 43 25 19 N | 092 11 34 W |
| Bonair (historical) | Locale | 400 | Howard | 43 25 19 N | 092 11 34 W |
| Bonair County Park | Park | 388 | Howard | 43 24 15 N | 092 11 41 W |
| Bonair Methodist Church | Church | 400 | Howard | 43 25 17 N | 092 11 27 W |
| Bonair Post Office (historical) | Post Office | 400 | Howard | 43 25 19 N | 092 11 34 W |
| Bonaparte | Populated Place | 166 | Van Buren | 40 41 53 N | 091 48 12 W |
| Bonaparte (historical) | Locale | 176 | Van Buren | 40 42 00 N | 091 48 06 W |
| Bonaparte Baptist Church | Church | 184 | Van Buren | 40 42 05 N | 091 48 06 W |
| Bonaparte Cemetery | Cemetery | 175 | Van Buren | 40 42 05 N | 091 48 31 W |
| Bonaparte City Fire Department | Building | 166 | Van Buren | 40 41 53 N | 091 48 12 W |
| Bonaparte City Hall | Building | 167 | Van Buren | 40 41 53 N | 091 48 11 W |
| Bonaparte City Park | Park | 166 | Van Buren | 40 41 52 N | 091 48 19 W |
| Bonaparte Post Office | Post Office | 166 | Van Buren | 40 41 53 N | 091 48 12 W |
| Bonaparte Presbyterian Church | Church | 166 | Van Buren | 40 41 53 N | 091 48 12 W |
| Bonaparte Public Library | Building | 170 | Van Buren | 40 41 55 N | 091 48 06 W |
| Bonaparte United Methodist Church | Church | 166 | Van Buren | 40 41 53 N | 091 48 12 W |
| Bond Hill County Park | Park | 207 | Keokuk | 41 14 07 N | 091 58 47 W |
| Bondurant | Locale | 296 | Polk | 41 42 07 N | 093 27 39 W |
| Bondurant | Populated Place | 296 | Polk | 41 42 02 N | 093 27 44 W |
| Bondurant Baptist Church | Church | 296 | Polk | 41 42 01 N | 093 27 41 W |
| Bondurant Cemetery | Cemetery | 299 | Polk | 41 41 58 N | 093 27 11 W |
| Bondurant Christian Church | Church | 293 | Polk | 41 41 53 N | 093 27 49 W |
| Bondurant City Hall | Building | 296 | Polk | 41 42 12 N | 093 27 32 W |
| Bondurant Community Library | Building | 296 | Polk | 41 42 03 N | 093 27 44 W |
| Bondurant Family Clinic | Hospital | 293 | Polk | 41 41 40 N | 093 27 31 W |
| Bondurant Park | Park | 292 | Polk | 41 41 57 N | 093 27 40 W |
| Bondurant Post Office | Post Office | 296 | Polk | 41 42 12 N | 093 27 40 W |
| Bondurant-Farrar Junior and Senior High School | School | 294 | Polk | 41 41 55 N | 093 27 55 W |
| Bone Cemetery | Cemetery | 267 | Poweshiek | 41 34 00 N | 092 34 31 W |
| Bonebright Museum Complex | Locale | 316 | Hamilton | 42 27 34 N | 093 48 56 W |
| Bonell Creek | Stream | | Jefferson | 40 59 48 N | 092 05 24 W |
| Bonnell Cemetery | Cemetery | 214 | Lee | 40 42 21 N | 091 33 50 W |
| Bonnell Creek | Stream | | Lee | 40 40 51 N | 091 30 04 W |
| Bonnie Creek | Stream | | Shelby | 41 38 18 N | 095 08 05 W |
| Bonnie Lake | Lake | 177 | Jackson | 42 11 35 N | 090 21 53 W |
| Bonnifield Cemetery | Cemetery | 223 | Jefferson | 40 59 15 N | 091 47 49 W |
| Bonthala Clinic | Hospital | 303 | Story | 42 01 14 N | 093 27 04 W |
| Bontrager Park | Park | 272 | Black Hawk | 42 27 47 N | 092 20 53 W |
| Boomer Grove Post Office (historical) | Post Office | 366 | Pottawattamie | 41 27 55 N | 095 47 56 W |
| Boomer Post Office (historical) | Post Office | 368 | Pottawattamie | 41 27 20 N | 095 50 16 W |
| Boone | Locale | 345 | Boone | 42 03 54 N | 093 52 42 W |
| Boone | Populated Place | 346 | Boone | 42 03 35 N | 093 52 49 W |
| Boone Biblical Memorial Church | Church | 340 | Boone | 42 03 31 N | 093 54 19 W |
| Boone Bridge | Bridge | 264 | Boone | 42 02 35 N | 093 56 01 W |
| Boone Bridge Two | Bridge | 264 | Boone | 42 03 47 N | 093 58 09 W |
| Boone Campus Library | Building | 348 | Boone | 42 02 45 N | 093 52 36 W |
| Boone Cemetery | Cemetery | 354 | Madison | 41 11 30 N | 094 10 31 W |
| Boone Country Club | Locale | 350 | Boone | 42 03 01 N | 093 52 18 W |
| Boone County | Civil | 268 | Boone | 42 02 00 N | 093 56 01 W |
| Boone County Courthouse | Building | 341 | Boone | 42 03 32 N | 093 54 22 W |
| Boone County Fairgrounds | Locale | 347 | Boone | 42 03 55 N | 093 52 11 W |
| Boone County Farm Cemetery | Cemetery | 348 | Boone | 42 09 10 N | 093 54 31 W |
| Boone County Historical Center | Building | 341 | Boone | 42 03 43 N | 093 52 46 W |
| Boone County Home | Building | 352 | Boone | 42 09 15 N | 093 54 29 W |
| Boone County Hospital | Hospital | 351 | Boone | 42 03 22 N | 093 52 42 W |
| Boone County Sheriffs Office | Building | 341 | Boone | 42 03 32 N | 093 54 22 W |
| Boone Family Practice Center | Hospital | 351 | Boone | 42 03 22 N | 093 52 43 W |
| Boone Fire Department | Building | 345 | Boone | 42 03 52 N | 093 52 49 W |
| Boone Forks Public Hunting Area | Area | 326 | Hamilton | 42 18 38 N | 093 55 37 W |
| Boone High School | School | 343 | Boone | 42 03 44 N | 093 53 15 W |
| Boone Memorial Garden | Cemetery | 329 | Boone | 42 02 42 N | 093 54 56 W |
| Boone Municipal Airport | Airport | 347 | Boone | 42 02 58 N | 093 50 51 W |
| Boone Police Department | Building | 345 | Boone | 42 03 52 N | 093 52 49 W |
| Boone Post Office | Post Office | 345 | Boone | 42 03 51 N | 093 52 57 W |
| Boone River | Stream | | Hamilton | 42 18 38 N | 093 56 10 W |
| Boone River Bridge | Bridge | 337 | Wright | 42 51 27 N | 093 56 46 W |
| Boone River Green Belt - Middleton Access | Locale | 332 | Wright | 42 35 30 N | 093 54 01 W |
| Boone School | School | 232 | Johnson | 41 33 17 N | 091 39 22 W |
| Boone Township Cemetery | Cemetery | 366 | Hancock | 43 02 22 N | 093 52 44 W |
| Boone Valley School | School | 350 | Humboldt | 42 49 50 N | 093 58 38 W |
| Boones Forks Wildlife Management Area | Park | 323 | Webster | 42 17 10 N | 093 56 31 W |
| Boonesboro Post Office (historical) | Post Office | 338 | Boone | 42 03 40 N | 093 54 31 W |
| Boonesfork Wildlife Area | Park | 308 | Hamilton | 42 19 05 N | 093 55 31 W |
| Booneville | Locale | 260 | Dallas | 41 31 25 N | 093 53 03 W |
| Booneville | Populated Place | 261 | Dallas | 41 31 27 N | 093 53 02 W |
| Booneville Access | Locale | 257 | Dallas | 41 31 25 N | 093 53 23 W |
| Booneville Cemetery | Cemetery | 297 | Dallas | 41 31 46 N | 093 53 05 W |
| Booneville Post Office | Post Office | 261 | Dallas | 41 31 27 N | 093 53 02 W |
| Boot Hill Cemetery | Cemetery | 272 | Jones | 42 06 44 N | 091 18 31 W |
| Booth Hospital | Hospital | 283 | Polk | 41 33 36 N | 093 36 13 W |
| Borcherding Cemetery | Cemetery | 301 | Clayton | 42 49 06 N | 091 08 29 W |
| Border Plains | Populated Place | 332 | Webster | 42 23 53 N | 094 02 53 W |
| Border Plains Cemetery | Cemetery | 338 | Webster | 42 23 40 N | 094 02 21 W |