Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Buckland Post Office (historical) | Post Office | 224 | Allamakee | 43 07 32 N | 091 18 50 W |
| Buckley Cemetery | Cemetery | 326 | Boone | 42 06 00 N | 093 56 31 W |
| Buckley Creek | Stream | | Mahaska | 41 26 14 N | 092 48 27 W |
| Bucknell | Populated Place | 281 | Monroe | 41 03 58 N | 093 02 40 W |
| Bucknell Post Office (historical) | Post Office | 281 | Monroe | 41 03 58 N | 093 02 40 W |
| Bucknell Ruins | Locale | 277 | Monroe | 41 03 58 N | 093 02 47 W |
| Buckner Cemetery | Cemetery | 327 | Hardin | 42 22 07 N | 093 02 44 W |
| Bucks Branch | Stream | | Dallas | 41 50 33 N | 094 08 44 W |
| Bucksbaum Center for the Arts | Building | 312 | Poweshiek | 41 44 48 N | 092 43 19 W |
| Bucy Cemetery | Cemetery | 289 | Decatur | 40 41 26 N | 093 53 22 W |
| Bucyrus Post Office (historical) | Post Office | 266 | Lucas | 41 04 38 N | 093 18 01 W |
| Bud Creek | Stream | | Scott | 41 39 25 N | 090 20 37 W |
| Buda | Locale | 375 | Pocahontas | 42 37 15 N | 094 30 04 W |
| Buda | Locale | 369 | Pocahontas | 42 38 31 N | 094 32 24 W |
| Buda Post Office (historical) | Post Office | 369 | Pocahontas | 42 38 31 N | 094 32 24 W |
| Budd | Populated Place | 232 | Dubuque | 42 31 59 N | 090 48 56 W |
| Buel Field | Park | 277 | Polk | 41 36 22 N | 093 39 14 W |
| Buell Park Cemetery | Cemetery | 257 | Clayton | 43 01 00 N | 091 12 00 W |
| Buell School | School | 203 | Clinton | 41 52 55 N | 090 10 43 W |
| Buena Vista | Populated Place | 199 | Clinton | 41 44 31 N | 090 44 26 W |
| Buena Vista (historical) | Populated Place | 151 | Lee | 40 23 12 N | 091 26 02 W |
| Buena Vista Cemetery | Cemetery | 200 | Clayton | 42 40 39 N | 090 57 15 W |
| Buena Vista Clinic | Hospital | 436 | Buena Vista | 42 38 42 N | 095 13 22 W |
| Buena Vista Clinic | Hospital | 435 | Buena Vista | 42 38 46 N | 095 13 16 W |
| Buena Vista County | Civil | 409 | Buena Vista | 42 44 00 N | 095 09 01 W |
| Buena Vista County Courthouse | Building | 437 | Buena Vista | 42 38 42 N | 095 11 56 W |
| Buena Vista County Historical Society Museum | Building | 436 | Buena Vista | 42 38 39 N | 095 12 09 W |
| Buena Vista County Home | Building | 419 | Buena Vista | 42 41 18 N | 095 10 14 W |
| Buena Vista County Hospital | Hospital | 436 | Buena Vista | 42 38 42 N | 095 13 22 W |
| Buena Vista County Law Library | Building | 437 | Buena Vista | 42 38 42 N | 095 11 56 W |
| Buena Vista County Park | Park | 413 | Buena Vista | 42 53 07 N | 095 20 06 W |
| Buena Vista County Park | Park | 197 | Scott | 41 43 41 N | 090 43 50 W |
| Buena Vista Fairgrounds | Locale | 454 | Buena Vista | 42 40 30 N | 095 17 46 W |
| Buena Vista Memorial Park Cemetery | Cemetery | 440 | Buena Vista | 42 39 14 N | 095 14 03 W |
| Buena Vista Mound Cemetery | Cemetery | 171 | Lee | 40 23 15 N | 091 26 40 W |
| Buena Vista School | Locale | 277 | Clayton | 42 39 25 N | 090 58 33 W |
| Buena Vista School | School | 202 | Des Moines | 40 47 50 N | 091 10 16 W |
| Buena Vista University | School | 433 | Buena Vista | 42 38 28 N | 095 12 31 W |
| Buena Vista University - Iowa Falls Campus | School | 345 | Hardin | 42 31 38 N | 093 16 01 W |
| Buena Vista University - Marshalltown Campus | School | 305 | Marshall | 42 00 04 N | 092 54 31 W |
| Buenavista Post Office (historical) | Post Office | 198 | Clinton | 41 44 31 N | 090 44 36 W |
| Buffalo | Locale | 170 | Scott | 41 27 20 N | 090 43 16 W |
| Buffalo | Populated Place | 283 | Madison | 41 18 40 N | 094 00 13 W |
| Buffalo | Populated Place | 172 | Scott | 41 27 23 N | 090 43 25 W |
| Buffalo Bill Cody Homestead | Locale | 197 | Scott | 41 42 50 N | 090 27 04 W |
| Buffalo Bill Homestead | Locale | 186 | Scott | 41 44 46 N | 090 26 35 W |
| Buffalo Bill Museum | Building | 178 | Scott | 41 35 55 N | 090 20 35 W |
| Buffalo Cemetery | Cemetery | 263 | Linn | 42 02 14 N | 091 42 02 W |
| Buffalo Center | Populated Place | 363 | Winnebago | 43 23 09 N | 093 56 48 W |
| Buffalo Center (historical) | Locale | 363 | Winnebago | 43 23 07 N | 093 56 49 W |
| Buffalo Center Airport | Airport | 360 | Winnebago | 43 19 60 N | 093 58 01 W |
| Buffalo Center Chiropractic | Hospital | 363 | Winnebago | 43 23 10 N | 093 56 46 W |
| Buffalo Center Post Office | Post Office | 363 | Winnebago | 43 23 14 N | 093 56 46 W |
| Buffalo Center Public Library | Building | 363 | Winnebago | 43 23 10 N | 093 56 48 W |
| Buffalo City Hall | Building | 174 | Scott | 41 27 26 N | 090 43 19 W |
| Buffalo City Park | Park | 176 | Scott | 41 27 30 N | 090 42 59 W |
| Buffalo Civic Center | Building | 180 | Scott | 41 27 31 N | 090 43 16 W |
| Buffalo Creek | Stream | | Benton | 41 54 27 N | 092 02 51 W |
| Buffalo Creek | Stream | | Cherokee | 42 34 00 N | 095 48 35 W |
| Buffalo Creek | Stream | | Crawford | 42 02 20 N | 095 21 22 W |
| Buffalo Creek | Stream | | Franklin | 42 48 54 N | 093 14 22 W |
| Buffalo Creek | Stream | | Ida | 42 22 36 N | 095 27 02 W |
| Buffalo Creek | Stream | | Johnson | 41 42 30 N | 091 42 35 W |
| Buffalo Creek | Stream | | Jones | 42 06 10 N | 091 18 01 W |
| Buffalo Creek | Stream | | Kossuth | 43 14 42 N | 093 58 46 W |
| Buffalo Creek | Stream | | Winnebago | 43 16 45 N | 093 39 24 W |
| Buffalo Creek Access Area | Park | 309 | Buchanan | 42 28 20 N | 091 41 41 W |
| Buffalo Creek Country Club | Locale | 302 | Buchanan | 42 27 60 N | 091 42 56 W |
| Buffalo Creek County Park | Park | 302 | Buchanan | 42 27 54 N | 091 42 49 W |
| Buffalo Creek County Parkway | Park | 282 | Linn | 42 17 22 N | 091 32 08 W |
| Buffalo Creek Game Management Dam | Dam | 342 | Kossuth | 43 12 31 N | 094 09 46 W |
| Buffalo Creek State Game Management Area | Park | 343 | Kossuth | 43 12 55 N | 094 09 41 W |
| Buffalo Creek Wildlife Area | Park | 292 | Buchanan | 42 24 05 N | 091 38 46 W |
| Buffalo Elementary School | School | 178 | Scott | 41 27 30 N | 090 43 02 W |
| Buffalo Fire Station | Building | 174 | Scott | 41 27 26 N | 090 43 19 W |
| Buffalo Fork Post Office (historical) | Post Office | 348 | Kossuth | 43 13 46 N | 094 08 13 W |
| Buffalo Friends Church | Church | 175 | Scott | 41 27 27 N | 090 43 09 W |
| Buffalo Grove | Locale | 326 | Buchanan | 42 35 16 N | 091 43 47 W |
| Buffalo Grove Post Office (historical) | Post Office | 328 | Buchanan | 42 35 17 N | 091 43 44 W |
| Buffalo Heights | Populated Place | 211 | Scott | 41 28 21 N | 090 42 53 W |
| Buffalo Post Office | Post Office | 171 | Scott | 41 27 21 N | 090 43 17 W |
| Buffalo Ridge | Ridge | 309 | Boone | 41 56 51 N | 093 54 09 W |
| Buffalo School | School | 283 | Madison | 41 18 45 N | 094 00 06 W |
| Buffalo Slough | Stream | | Des Moines | 41 03 00 N | 090 57 56 W |
| Buffalo Station Library | Building | 180 | Scott | 41 27 31 N | 090 43 16 W |
| Buffalo Township Cemetery | Cemetery | 360 | Kossuth | 43 12 57 N | 094 02 53 W |
| Buffalo United Methodist Church | Church | 249 | Linn | 42 02 30 N | 091 44 01 W |
| Buffalo Wallow School | School | 300 | Monroe | 40 58 56 N | 092 52 17 W |
| Buffington Cemetery | Cemetery | 209 | Louisa | 41 12 50 N | 091 23 51 W |
| Buffington Creek | Stream | | Louisa | 41 12 52 N | 091 22 46 W |
| Building 402 | Building | 233 | Jefferson | 41 01 00 N | 091 58 10 W |
| Building C | Building | 345 | Cerro Gordo | 43 09 30 N | 093 07 59 W |
| Bulger Creek | Stream | | Dallas | 41 32 20 N | 093 58 54 W |
| Bulger Creek Bridge | Bridge | 268 | Dallas | 41 31 42 N | 094 00 11 W |
| Bulgers Hollow | Populated Place | 184 | Clinton | 41 56 07 N | 090 11 02 W |
| Bulgers Run | Stream | | Washington | 41 28 31 N | 091 37 21 W |
| Bull Creek | Stream | | Adams | 41 03 01 N | 094 49 49 W |
| Bull Ditch | Canal | 445 | Dickinson | 43 21 06 N | 095 04 16 W |
| Bull Run | Stream | | Audubon | 41 37 53 N | 095 03 50 W |
| Bull Run | Stream | | Plymouth | 42 45 03 N | 096 27 23 W |
| Bull Run | Stream | | Warren | 41 26 40 N | 093 40 19 W |
| Bullard | Populated Place | 171 | Lee | 40 37 00 N | 091 24 26 W |
| Bullhead Lake | Lake | 214 | Cedar | 41 56 12 N | 090 55 23 W |
| Bullis Cemetery | Cemetery | 186 | Louisa | 41 22 10 N | 091 22 41 W |
| Bullock Cemetery | Cemetery | 367 | Madison | 41 11 46 N | 094 03 55 W |
| Bullock Jones Building | Building | 344 | Hardin | 42 31 36 N | 093 15 59 W |
| Bultman Center for Athletics | Building | 437 | Sioux | 42 59 45 N | 096 03 34 W |
| Bunch Cemetery | Cemetery | 304 | Marshall | 42 12 32 N | 093 03 34 W |
| Bunch Post Office (historical) | Post Office | 283 | Davis | 40 47 22 N | 092 35 29 W |
| Bunch Station (historical) | Locale | 283 | Davis | 40 47 22 N | 092 35 29 W |