Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Benedict Hollow | Valley | | Jones | 42 10 17 N | 090 54 54 W |
| Benjamin Bell Historical Marker | Park | 315 | Webster | 42 19 04 N | 093 56 33 W |
| Benjamin Creek | Stream | | Jasper | 41 43 28 N | 093 05 08 W |
| Benjamin Fraseur Log Cabin (historical) | Building | 217 | Cedar | 41 54 58 N | 090 55 19 W |
| Benjegerdes Family Plot | Cemetery | 372 | Worth | 43 18 30 N | 093 16 01 W |
| Bennet Lake | Reservoir | 221 | Cedar | 41 54 47 N | 090 55 10 W |
| Bennet Lake Dam | Dam | 221 | Cedar | 41 54 47 N | 090 55 10 W |
| Bennett | Populated Place | 230 | Cedar | 41 44 25 N | 090 58 26 W |
| Bennett - North River Stone School (historical) | School | 272 | Madison | 41 24 30 N | 093 59 31 W |
| Bennett (historical) | Locale | 230 | Cedar | 41 44 25 N | 090 58 26 W |
| Bennett Access | Locale | 331 | Mitchell | 43 17 10 N | 092 51 06 W |
| Bennett Cemetery | Cemetery | 316 | Madison | 41 26 19 N | 094 02 56 W |
| Bennett Community School | School | 235 | Cedar | 41 44 27 N | 090 58 36 W |
| Bennett County Park | Park | 321 | Carroll | 42 05 56 N | 094 39 05 W |
| Bennett Creek | Stream | | Cedar | 41 42 00 N | 091 02 40 W |
| Bennett Creek | Stream | | Tama | 41 57 26 N | 092 37 50 W |
| Bennett Fire Department | Building | 228 | Cedar | 41 44 22 N | 090 58 26 W |
| Bennett Library | Building | 228 | Cedar | 41 44 22 N | 090 58 26 W |
| Bennett Park | Park | 234 | Cedar | 41 44 40 N | 090 55 11 W |
| Bennett Police Department | Building | 228 | Cedar | 41 44 22 N | 090 58 26 W |
| Bennett Post Office | Post Office | 231 | Cedar | 41 44 32 N | 090 58 26 W |
| Bennett Student Services Center | Building | 247 | Wapello | 41 02 45 N | 092 23 41 W |
| Bennettsville | Populated Place | 324 | Dubuque | 42 21 36 N | 090 43 41 W |
| Bennettville Post Office (historical) | Post Office | 324 | Dubuque | 42 21 36 N | 090 43 41 W |
| Bennezette Church | Church | 315 | Butler | 42 49 58 N | 092 56 49 W |
| Bennington Post Office (historical) | Post Office | 249 | Marion | 41 29 43 N | 093 17 34 W |
| Bennington Township Cemetery | Cemetery | 296 | Black Hawk | 42 35 04 N | 092 15 29 W |
| Benny Gambaiani Public Library | Building | 278 | Butler | 42 42 39 N | 092 34 56 W |
| Benson | Populated Place | 275 | Black Hawk | 42 32 33 N | 092 32 32 W |
| Benson Cemetery | Cemetery | 286 | Black Hawk | 42 32 47 N | 092 33 13 W |
| Benson Cemetery | Cemetery | 339 | Fremont | 40 43 20 N | 095 40 01 W |
| Benson Cemetery | Cemetery | 312 | Grundy | 42 15 08 N | 092 58 52 W |
| Benson Cemetery | Cemetery | 223 | Washington | 41 14 16 N | 091 36 40 W |
| Benson Grove Post Office (historical) | Post Office | 384 | Winnebago | 43 21 00 N | 093 37 17 W |
| Benson Park | Park | 345 | Wright | 42 43 53 N | 093 47 01 W |
| Benson Post Office (historical) | Post Office | 275 | Black Hawk | 42 32 33 N | 092 32 32 W |
| Bent Tree Golf Club | Locale | 388 | Pottawattamie | 41 16 50 N | 095 43 41 W |
| Bente Branch | Stream | | Clayton | 42 48 48 N | 091 20 15 W |
| Bentler Farm Cemetery | Cemetery | 221 | Lee | 40 47 30 N | 091 25 01 W |
| Bentley | Populated Place | 387 | Pottawattamie | 41 22 37 N | 095 37 13 W |
| Bentley (historical) | Locale | 387 | Pottawattamie | 41 22 42 N | 095 37 18 W |
| Bentley Post Office (historical) | Post Office | 387 | Pottawattamie | 41 22 37 N | 095 37 13 W |
| Benton | Locale | 281 | Benton | 42 06 05 N | 092 17 57 W |
| Benton | Locale | 324 | Mills | 41 05 54 N | 095 30 47 W |
| Benton | Populated Place | 330 | Ringgold | 40 42 12 N | 094 21 30 W |
| Benton (historical) | Locale | 324 | Ringgold | 40 42 10 N | 094 21 26 W |
| Benton Cemetery | Cemetery | 347 | Ringgold | 40 43 10 N | 094 21 25 W |
| Benton Center School | School | 325 | Wayne | 40 46 08 N | 093 22 32 W |
| Benton Centre | Locale | 296 | Benton | 42 02 36 N | 092 05 12 W |
| Benton Centre Post Office (historical) | Post Office | 295 | Benton | 42 02 30 N | 092 05 12 W |
| Benton City (historical) | Populated Place | 229 | Benton | 42 09 30 N | 091 56 02 W |
| Benton City Fry Recreation Area | Park | 247 | Benton | 42 09 44 N | 091 55 05 W |
| Benton City Post Office (historical) | Post Office | 232 | Benton | 42 09 30 N | 091 55 51 W |
| Benton Community High School | School | 290 | Benton | 42 00 45 N | 092 05 13 W |
| Benton County | Civil | 279 | Benton | 42 04 00 N | 092 04 01 W |
| Benton County Courthouse | Building | 240 | Benton | 42 10 05 N | 092 01 25 W |
| Benton County Fairgrounds | Locale | 243 | Benton | 42 09 16 N | 092 01 21 W |
| Benton County Home | Building | 263 | Benton | 42 09 08 N | 091 59 29 W |
| Benton County Sheriff Office | Building | 240 | Benton | 42 10 05 N | 092 01 24 W |
| Benton County Speedway | Locale | 243 | Benton | 42 09 16 N | 092 01 21 W |
| Benton Elementary School | School | 261 | Benton | 41 59 40 N | 091 51 58 W |
| Benton Post Office | Post Office | 330 | Ringgold | 40 42 12 N | 094 21 30 W |
| Benton Post Office (historical) | Post Office | 324 | Mills | 41 05 54 N | 095 30 47 W |
| Benton Station (historical) | Populated Place | 273 | Benton | 42 08 43 N | 092 08 41 W |
| Benton Timbers Park | Park | 219 | Washington | 41 13 30 N | 091 51 41 W |
| Bentonsport | Populated Place | 171 | Van Buren | 40 43 32 N | 091 51 14 W |
| Bentonsport (historical) | Locale | 174 | Van Buren | 40 43 34 N | 091 51 14 W |
| Bentonsport Academy (historical) | School | 171 | Van Buren | 40 43 32 N | 091 51 14 W |
| Bentonsport Bridge | Bridge | 171 | Van Buren | 40 43 32 N | 091 51 15 W |
| Bentonsport Cemetery | Cemetery | 213 | Van Buren | 40 43 56 N | 091 51 06 W |
| Bentonsport Post Office (historical) | Post Office | 171 | Van Buren | 40 43 32 N | 091 51 14 W |
| Bentonsport Presbyterian Church | Church | 171 | Van Buren | 40 43 32 N | 091 51 14 W |
| Bentonsport River-Side County Park | Park | 169 | Van Buren | 40 43 30 N | 091 51 14 W |
| Bentonsport Timber Area | Park | 199 | Van Buren | 40 43 40 N | 091 51 06 W |
| Bentonsville (historical) | Locale | 332 | Wayne | 40 46 58 N | 093 22 21 W |
| Bentonville Post Office (historical) | Post Office | 332 | Wayne | 40 46 58 N | 093 22 23 W |
| Berea | Populated Place | 396 | Adair | 41 22 27 N | 094 40 49 W |
| Berea Church | Church | 354 | Taylor | 40 37 08 N | 094 44 44 W |
| Berea Church (historical) | Church | 181 | Scott | 41 31 25 N | 090 36 41 W |
| Berea Post Office (historical) | Post Office | 396 | Adair | 41 22 27 N | 094 40 49 W |
| Berean Assembly of God Church | Church | 275 | Polk | 41 35 55 N | 093 30 33 W |
| Berean Baptist Church | Church | 331 | Boone | 42 03 13 N | 093 54 53 W |
| Berean Baptist Church | Church | 262 | Marion | 41 24 09 N | 092 54 57 W |
| Berean Bible Church | Church | 272 | Jones | 42 10 50 N | 091 09 51 W |
| Berean Church | Church | 218 | Scott | 41 31 52 N | 090 37 14 W |
| Berean Church of Christ | Church | 256 | Polk | 41 36 51 N | 093 37 57 W |
| Berean Fellowship | Church | 229 | Washington | 41 17 40 N | 091 41 30 W |
| Berg School | School | 291 | Jasper | 41 42 16 N | 093 01 37 W |
| Bergen | Locale | 324 | Allamakee | 43 29 60 N | 091 33 56 W |
| Bergen Cemetery | Cemetery | 351 | Story | 42 12 12 N | 093 24 09 W |
| Bergen Lutheran Church | Church | 312 | Story | 42 10 01 N | 093 30 09 W |
| Bergen Post Office (historical) | Post Office | 314 | Allamakee | 43 29 58 N | 091 34 01 W |
| Berhow Park | Park | 306 | Story | 41 53 49 N | 093 35 56 W |
| Berkhimer Bridge | Bridge | 329 | Humboldt | 42 44 21 N | 094 15 11 W |
| Berkley | Populated Place | 302 | Boone | 41 56 42 N | 094 06 53 W |
| Berkley (historical) | Locale | 302 | Boone | 41 56 42 N | 094 06 53 W |
| Berkley Post Office (historical) | Post Office | 302 | Boone | 41 56 42 N | 094 06 53 W |
| Berkley School (historical) | School | 302 | Boone | 41 56 42 N | 094 06 53 W |
| Berlin | Populated Place | 347 | Hardin | 42 25 07 N | 093 09 38 W |
| Berlin (historical) | Locale | 308 | Tama | 42 16 39 N | 092 41 33 W |
| Berlin Community Church | Church | 346 | Hardin | 42 25 04 N | 093 09 32 W |
| Berlin Post Office (historical) | Post Office | 347 | Hardin | 42 25 07 N | 093 09 38 W |
| Bernard | Populated Place | 280 | Dubuque | 42 18 44 N | 090 49 54 W |
| Bernard (historical) | Locale | 285 | Dubuque | 42 18 36 N | 090 49 50 W |
| Bernard Fire Department | Building | 280 | Dubuque | 42 18 44 N | 090 49 54 W |
| Bernard Post Office | Post Office | 280 | Dubuque | 42 18 44 N | 090 49 54 W |
| Bernard Town Hall | Building | 280 | Dubuque | 42 18 44 N | 090 49 54 W |
| Berne | Populated Place | 371 | Crawford | 42 04 52 N | 095 39 10 W |
| Berne Co-op Elevator | Locale | 370 | Monona | 42 03 02 N | 095 42 33 W |
| Bernhart | Populated Place | 230 | Jefferson | 41 00 45 N | 092 04 05 W |