Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Baileys Ford Recreation Area | Park | 274 | Delaware | 42 26 41 N | 091 24 38 W |
| Baird | Populated Place | 327 | Harrison | 41 47 55 N | 095 39 16 W |
| Baird Timber | Park | 215 | Louisa | 41 06 15 N | 091 13 01 W |
| Baker Cemetery | Cemetery | 283 | Appanoose | 40 36 10 N | 092 55 51 W |
| Baker Cemetery | Cemetery | 308 | Appanoose | 40 44 50 N | 092 56 01 W |
| Baker Cemetery | Cemetery | 314 | Decatur | 40 42 39 N | 093 37 55 W |
| Baker Cemetery | Cemetery | 367 | Fremont | 40 40 30 N | 095 41 01 W |
| Baker Cemetery | Cemetery | 228 | Linn | 41 56 18 N | 091 38 02 W |
| Baker Cemetery | Cemetery | 355 | Page | 40 45 14 N | 095 13 07 W |
| Baker Church | Church | 430 | O'Brien | 43 04 10 N | 095 47 58 W |
| Baker Creek | Stream | | Van Buren | 40 43 37 N | 091 45 39 W |
| Baker Hall | Building | 282 | Black Hawk | 42 30 49 N | 092 27 37 W |
| Baker Number Two School (historical) | School | 326 | Guthrie | 41 40 22 N | 094 30 36 W |
| Baker Park | Park | 373 | Woodbury | 42 24 25 N | 096 20 49 W |
| Baker Post Office (historical) | Post Office | 237 | Jefferson | 41 06 45 N | 091 58 03 W |
| Baker School Cemetery | Cemetery | 267 | Winneshiek | 43 17 38 N | 091 40 43 W |
| Baker Township Cemetery | Cemetery | 461 | Osceola | 43 18 50 N | 095 33 51 W |
| Baker-Hebron Science Hall | Building | 315 | Fayette | 42 50 25 N | 091 47 56 W |
| Bakers Creek | Stream | | Dubuque | 42 23 07 N | 091 01 02 W |
| Bakers Cut Cemetery | Cemetery | 357 | Montgomery | 40 54 30 N | 094 57 31 W |
| Bakers Grove Cemetery | Cemetery | 305 | Tama | 42 07 55 N | 092 30 53 W |
| Bakers Point | Cape | 427 | Dickinson | 43 29 06 N | 095 07 26 W |
| Balaka Post Office (historical) | Post Office | 307 | Clarke | 41 07 18 N | 093 45 41 W |
| Bald Face School (historical) | School | 200 | Clinton | 41 46 55 N | 090 21 17 W |
| Bald Point | Cliff | 245 | Clinton | 41 59 08 N | 090 10 12 W |
| Baldus Cemetery | Cemetery | 311 | Story | 42 07 50 N | 093 36 31 W |
| Baldwin | Populated Place | 223 | Jackson | 42 04 27 N | 090 50 30 W |
| Baldwin (historical) | Locale | 219 | Jackson | 42 04 22 N | 090 50 27 W |
| Baldwin Catholic Cemetery | Cemetery | 244 | Jackson | 42 04 39 N | 090 50 31 W |
| Baldwin Cemetery | Cemetery | 368 | Adams | 40 58 37 N | 094 49 29 W |
| Baldwin Cemetery | Cemetery | 266 | Mahaska | 41 28 59 N | 092 46 35 W |
| Baldwin Fire Department | Building | 222 | Jackson | 42 04 27 N | 090 50 27 W |
| Baldwin House | Building | 267 | Linn | 41 55 40 N | 091 25 41 W |
| Baldwin Mason Creek | Stream | | Cedar | 41 48 16 N | 091 18 50 W |
| Baldwin Monmouth Methodist Church | Church | 222 | Jackson | 42 04 27 N | 090 50 27 W |
| Baldwin Post Office | Post Office | 222 | Jackson | 42 04 27 N | 090 50 27 W |
| Balfour | Populated Place | 355 | Mills | 41 02 56 N | 095 40 04 W |
| Balfour (historical) | Locale | 355 | Mills | 41 02 56 N | 095 40 04 W |
| Balfour Post Office (historical) | Post Office | 355 | Mills | 41 02 56 N | 095 40 04 W |
| Bali Hai Estates Mobile Home Park | Populated Place | 263 | Linn | 42 03 10 N | 091 40 03 W |
| Ballard Cemetery | Cemetery | 303 | Story | 41 53 60 N | 093 35 31 W |
| Ballard Country Club | Locale | 302 | Story | 41 54 46 N | 093 36 32 W |
| Ballard Creek | Stream | | Marion | 41 25 17 N | 093 09 29 W |
| Ballard Creek | Stream | | Pottawattamie | 41 28 47 N | 095 19 35 W |
| Ballard Creek | Stream | | Story | 41 53 52 N | 093 31 07 W |
| Ballard East Elementary School | School | 264 | Story | 41 53 58 N | 093 31 52 W |
| Ballard Elementary School | School | 316 | Story | 41 52 40 N | 093 40 43 W |
| Ballard Junior Senior High School | School | 313 | Story | 41 53 52 N | 093 36 26 W |
| Ballinger Creek | Stream | | Mahaska | 41 24 22 N | 092 47 23 W |
| Ballou Library Building | Building | 436 | Buena Vista | 42 38 32 N | 095 12 26 W |
| Balls Lake (historical) | Lake | 305 | Harrison | 41 35 18 N | 096 01 40 W |
| Balltown | Populated Place | 367 | Dubuque | 42 38 17 N | 090 52 07 W |
| Balltown Methodist Church | Church | 368 | Dubuque | 42 38 12 N | 090 52 00 W |
| Balltown Post Office (historical) | Post Office | 367 | Dubuque | 42 38 17 N | 090 52 07 W |
| Balltown Ridge | Summit | 355 | Dubuque | 42 38 15 N | 090 54 46 W |
| Balltown Sherrill Catholic Church | Church | 300 | Dubuque | 42 36 14 N | 090 47 04 W |
| Balltown Sherrill Catholic School | School | 300 | Dubuque | 42 36 14 N | 090 47 04 W |
| Balluff (historical) | Locale | 200 | Scott | 41 33 24 N | 090 35 00 W |
| Balluff Post Office (historical) | Post Office | 200 | Scott | 41 33 24 N | 090 35 00 W |
| Ballyclough | Populated Place | 324 | Dubuque | 42 25 33 N | 090 43 05 W |
| Ballyclough Post Office (historical) | Post Office | 324 | Dubuque | 42 25 33 N | 090 43 05 W |
| Baltimore (historical) | Populated Place | 174 | Henry | 40 51 28 N | 091 27 36 W |
| Bancroft | Populated Place | 360 | Kossuth | 43 17 34 N | 094 13 05 W |
| Bancroft (historical) | Locale | 357 | Kossuth | 43 17 36 N | 094 13 11 W |
| Bancroft Lake (historical) | Lake | 350 | Kossuth | 43 29 15 N | 094 15 20 W |
| Bancroft Medical and Dental Clinic | Hospital | 356 | Kossuth | 43 17 36 N | 094 13 15 W |
| Bancroft Post Office | Post Office | 360 | Kossuth | 43 17 34 N | 094 13 05 W |
| Bancroft Public Library | Building | 356 | Kossuth | 43 17 36 N | 094 13 15 W |
| Bancroft School | School | 316 | Montgomery | 41 00 52 N | 095 13 47 W |
| Bancroft School | School | 347 | Woodbury | 42 30 07 N | 096 24 30 W |
| Bandshell Park | Park | 387 | Cass | 41 26 40 N | 094 46 00 W |
| Bandshell Park | Park | 283 | Story | 42 01 35 N | 093 36 35 W |
| Bane Ridge Airport | Airport | 392 | Pottawattamie | 41 21 05 N | 095 28 09 W |
| Bangor | Populated Place | 308 | Marshall | 42 10 24 N | 093 05 37 W |
| Bangor Cemetery | Cemetery | 305 | Marshall | 42 10 13 N | 093 05 02 W |
| Bangor Post Office (historical) | Post Office | 308 | Marshall | 42 10 24 N | 093 05 37 W |
| Bangor Square County Park | Park | 306 | Marshall | 42 10 20 N | 093 05 16 W |
| Bank of Memories | Building | 413 | Adair | 41 12 11 N | 094 25 01 W |
| Bankston | Populated Place | 367 | Dubuque | 42 31 07 N | 090 57 40 W |
| Bankston Park Cemetery (historical) | Cemetery | 263 | Dubuque | 42 33 35 N | 090 56 50 W |
| Bankston Post Office (historical) | Post Office | 367 | Dubuque | 42 31 07 N | 090 57 40 W |
| Bankston School | School | 344 | Dubuque | 42 31 30 N | 090 55 09 W |
| Banner Cemetery | Cemetery | 364 | Woodbury | 42 29 08 N | 096 11 05 W |
| Banner Mine State Wildlife Management Area | Park | 238 | Warren | 41 26 27 N | 093 32 59 W |
| Banner Post Office (historical) | Post Office | 305 | Madison | 41 17 20 N | 093 53 51 W |
| Banner School | School | 202 | Johnson | 41 34 56 N | 091 34 48 W |
| Banner Valley Post Office (historical) | Post Office | 233 | Linn | 41 52 20 N | 091 34 41 W |
| Banta Cemetery | Cemetery | 323 | Wayne | 40 36 35 N | 093 18 38 W |
| Banwart Prairie | Area | 354 | Humboldt | 42 53 35 N | 094 23 36 W |
| Baptist Cemetery | Cemetery | 264 | Davis | 40 45 50 N | 092 33 01 W |
| Baptist Cemetery | Cemetery | 223 | Henry | 41 06 00 N | 091 37 51 W |
| Baptist Church | Church | 298 | Butler | 42 34 58 N | 092 53 06 W |
| Baptist Church | Church | 424 | Cherokee | 42 38 60 N | 095 30 16 W |
| Baptist Church | Church | 282 | Fremont | 40 36 29 N | 095 39 24 W |
| Baptist Church | Church | 352 | Humboldt | 42 49 38 N | 093 58 39 W |
| Baptist Church | Church | 272 | Iowa | 41 43 39 N | 092 17 27 W |
| Baptist Church | Church | 253 | Mahaska | 41 12 43 N | 092 26 14 W |
| Baptist Church | Church | 345 | Taylor | 40 39 60 N | 094 43 29 W |
| Baptist Church (historical) | Church | 350 | Ringgold | 40 37 04 N | 094 09 55 W |
| Baptist Convention of Iowa Church | Church | 286 | Polk | 41 37 00 N | 093 44 13 W |
| Baptist Mission | Church | 252 | Polk | 41 34 38 N | 093 42 41 W |
| Baptized Believers in Christ Church | Church | 217 | Johnson | 41 38 59 N | 091 30 21 W |
| Bar Slough | Stream | | Jackson | 42 11 32 N | 090 19 10 W |
| Bar-Jac Mobile Estates | Populated Place | 303 | Dallas | 41 51 35 N | 094 06 31 W |
| Barbee Cemetery | Cemetery | 267 | Jasper | 41 50 30 N | 093 12 01 W |
| Barber Cemetery | Cemetery | 202 | Clinton | 41 47 18 N | 090 37 46 W |
| Barber Creek | Stream | | Clinton | 41 46 11 N | 090 35 42 W |
| Barber Creek | Stream | | Monona | 42 10 33 N | 095 57 46 W |
| Barber Creek State Wildlife Management Area | Park | 190 | Clinton | 41 46 15 N | 090 36 33 W |
| Barclay Church | Church | 297 | Black Hawk | 42 30 43 N | 092 09 36 W |