Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Fort Madison Seventh Day Adventist Church | Church | 165 | Lee | 40 37 44 N | 091 19 43 W |
| Fort Museum and Frontier Village | Locale | 341 | Webster | 42 29 19 N | 094 11 57 W |
| Fort of Burlington Welcome Center | Building | 161 | Des Moines | 40 48 38 N | 091 05 58 W |
| Fort Plain (historical) | Locale | 260 | Warren | 41 13 05 N | 093 24 44 W |
| Fort Sumter Rock | Summit | 306 | Butler | 42 43 22 N | 092 53 19 W |
| Forum | Building | 311 | Poweshiek | 41 44 51 N | 092 43 13 W |
| Fosen Cemetery | Cemetery | 314 | Story | 42 12 33 N | 093 30 41 W |
| Foster | Populated Place | 287 | Monroe | 40 55 58 N | 092 45 27 W |
| Foster (historical) | Locale | 273 | Monroe | 40 55 44 N | 092 45 16 W |
| Foster Cemetery | Cemetery | 216 | Louisa | 41 22 43 N | 091 27 16 W |
| Foster Cemetery | Cemetery | 284 | Monroe | 40 56 28 N | 092 45 47 W |
| Foster Park | Park | 328 | Hardin | 42 31 30 N | 093 16 44 W |
| Foster Park | Park | 310 | Page | 40 44 20 N | 095 01 51 W |
| Foster Park | Park | 382 | Plymouth | 42 47 07 N | 096 09 57 W |
| Foster Park | Park | 216 | Wapello | 41 00 22 N | 092 22 60 W |
| Foster Post Office (historical) | Post Office | 332 | Madison | 41 13 50 N | 093 59 41 W |
| Foster Post Office (historical) | Post Office | 287 | Monroe | 40 55 58 N | 092 45 27 W |
| Foster Woods Park | Park | 239 | Washington | 41 26 57 N | 091 51 10 W |
| Fostoria | Populated Place | 444 | Clay | 43 14 32 N | 095 09 20 W |
| Fostoria (historical) | Locale | 441 | Clay | 43 14 30 N | 095 09 12 W |
| Fostoria City Hall | Building | 443 | Clay | 43 14 30 N | 095 09 19 W |
| Fostoria Cooperative Elevator | Locale | 441 | Clay | 43 14 32 N | 095 09 14 W |
| Fostoria Post Office | Post Office | 443 | Clay | 43 14 32 N | 095 09 19 W |
| Founders Hall | Building | 284 | Bremer | 42 43 43 N | 092 28 56 W |
| Founders Lake | Reservoir | 329 | Decatur | 40 37 05 N | 093 55 49 W |
| Founders of Iowa Falls Historical Marker | Park | 340 | Hardin | 42 31 13 N | 093 15 52 W |
| Founders Pond | Lake | 190 | Allamakee | 43 05 10 N | 091 11 45 W |
| Fountain Cemetery | Cemetery | 230 | Davis | 40 44 00 N | 092 17 01 W |
| Fountain Cemetery | Cemetery | 204 | Johnson | 41 31 12 N | 091 28 23 W |
| Fountain Mill Spring | Spring | 302 | Delaware | 42 36 13 N | 091 18 56 W |
| Fountain of Life Cathedral | Church | 287 | Polk | 41 33 21 N | 093 38 11 W |
| Fountain Springs Creek | Stream | | Delaware | 42 37 06 N | 091 17 29 W |
| Fountain Springs Park | Park | 297 | Delaware | 42 36 55 N | 091 18 00 W |
| Fountain Springs Post Office (historical) | Post Office | 210 | Wapello | 41 06 10 N | 092 31 36 W |
| Fountain Square Park | Park | 318 | Montgomery | 41 00 34 N | 095 13 43 W |
| Fountain West Health Care Center | Hospital | 267 | Polk | 41 35 33 N | 093 43 31 W |
| Fountainbleau Cemetery | Cemetery | 331 | Harrison | 41 49 30 N | 096 00 03 W |
| Four Corners | Locale | 224 | Jefferson | 41 01 27 N | 091 45 58 W |
| Four Corners Post Office (historical) | Post Office | 224 | Jefferson | 41 01 27 N | 091 45 58 W |
| Four Corners Recreation Area | Park | 427 | Carroll | 41 53 40 N | 095 05 06 W |
| Four Corners School | Locale | 375 | Mills | 40 58 28 N | 095 40 15 W |
| Four Horn Cemetery | Cemetery | 287 | Jones | 42 09 34 N | 091 07 52 W |
| Four Mile Lake Wildlife Management Area | Park | 436 | Emmet | 43 23 40 N | 094 54 31 W |
| Four Square Church | Church | 257 | Marion | 41 19 13 N | 093 05 01 W |
| Four Square Church | Church | 218 | Muscatine | 41 25 49 N | 091 04 38 W |
| Four Square Park | Park | 180 | Clinton | 41 52 21 N | 090 10 40 W |
| Fourmile Creek | Stream | | Audubon | 41 34 22 N | 094 47 37 W |
| Fourmile Creek | Stream | | Cass | 41 15 34 N | 094 59 50 W |
| Fourmile Creek | Stream | | Cherokee | 42 37 34 N | 095 39 37 W |
| Fourmile Creek | Stream | | Kossuth | 42 59 54 N | 094 14 49 W |
| Fourmile Creek | Stream | | Page | 40 47 17 N | 095 22 29 W |
| Fourmile Creek | Stream | | Polk | 41 33 55 N | 093 30 42 W |
| Fourmile Creek | Stream | | Tama | 42 11 16 N | 092 31 48 W |
| Fourmile Creek | Stream | | Union | 40 58 26 N | 094 02 15 W |
| Fourmile Grove Cemetery | Cemetery | 330 | Franklin | 42 41 42 N | 093 05 08 W |
| Fourmile Lake | Reservoir | 436 | Emmet | 43 23 22 N | 094 54 21 W |
| Foursome Country Club | Locale | 306 | Fayette | 42 39 11 N | 091 55 20 W |
| Foursquare Church | Church | 195 | Des Moines | 40 48 15 N | 091 06 55 W |
| Foursquare Gospel Church | Church | 195 | Clinton | 41 51 35 N | 090 11 39 W |
| Foursquare Gospel Church | Church | 286 | Jasper | 41 41 37 N | 093 02 01 W |
| Foursquare Gospel Church | Church | 232 | Jefferson | 40 59 24 N | 091 57 49 W |
| Foursquare Gospel Church | Church | 214 | Johnson | 41 39 00 N | 091 31 23 W |
| Foursquare Gospel Church | Church | 342 | Madison | 41 20 04 N | 094 00 41 W |
| Fourth Pumping Station County Park | Park | 163 | Des Moines | 41 03 46 N | 090 58 07 W |
| Fourth Street Bridge | Bridge | 382 | Emmet | 43 24 41 N | 094 50 29 W |
| Fourth Street Park | Park | 215 | Muscatine | 41 25 09 N | 091 03 13 W |
| Foutch Cemetery | Cemetery | 301 | Monroe | 41 02 20 N | 093 04 11 W |
| Fowler Cooperative Elevator | Locale | 366 | Kossuth | 43 03 43 N | 094 13 38 W |
| Fowler Elevator Incorporated Elevator | Locale | 324 | Wayne | 40 40 49 N | 093 07 11 W |
| Fox and Boyd Dental Center | Hospital | 385 | Buena Vista | 42 53 36 N | 095 09 01 W |
| Fox and Boyd Dental Center | Hospital | 400 | Clay | 43 08 30 N | 095 08 44 W |
| Fox Creek | Stream | | Dallas | 41 33 21 N | 093 50 48 W |
| Fox Creek | Stream | | Guthrie | 41 35 11 N | 094 37 19 W |
| Fox Forest County Recreation Area | Park | 258 | Poweshiek | 41 34 27 N | 092 33 36 W |
| Fox Hills Wildlife Management Area | Park | 218 | Wapello | 40 57 30 N | 092 18 11 W |
| Fox Landing Post Office (historical) | Post Office | 162 | Des Moines | 41 03 55 N | 090 57 06 W |
| Fox Pond | Lake | 163 | Louisa | 41 12 50 N | 091 06 01 W |
| Fox Post Office (historical) | Post Office | 261 | Davis | 40 47 30 N | 092 35 01 W |
| Fox Post Office (historical) | Post Office | 259 | Iowa | 41 41 20 N | 091 55 49 W |
| Fox Ridge Golf Course | Locale | 288 | Grundy | 42 27 51 N | 092 37 42 W |
| Fox River | Stream | | Van Buren | 40 36 41 N | 091 55 48 W |
| Fox Run | Stream | | Buena Vista | 42 53 00 N | 095 17 18 W |
| Fox Run Golf and Country Club | Locale | 242 | Johnson | 41 40 43 N | 091 21 59 W |
| Fox Run Golf Course | Locale | 297 | Pottawattamie | 41 12 30 N | 095 53 21 W |
| Fox School | School | 312 | Clarke | 41 03 28 N | 093 34 39 W |
| Fox Townhall | Building | 286 | Black Hawk | 42 25 43 N | 092 07 22 W |
| Fox Valley High School | School | 243 | Van Buren | 40 40 24 N | 092 09 44 W |
| Foxworthy School | Locale | 319 | Mills | 40 59 14 N | 095 35 09 W |
| Fraker (historical) | Locale | 281 | Monroe | 41 06 40 N | 092 48 43 W |
| Fraker Post Office (historical) | Post Office | 285 | Monroe | 41 06 40 N | 092 49 01 W |
| Frances Banta Waggoner Library | Building | 219 | Clinton | 41 49 30 N | 090 32 15 W |
| Francesca's House | Building | 302 | Madison | 41 28 00 N | 093 49 41 W |
| Francis Marion Intermediate School | School | 263 | Linn | 42 01 45 N | 091 35 15 W |
| Francis School | School | 303 | Pottawattamie | 41 15 33 N | 095 51 18 W |
| Francisco Cemetery | Cemetery | 291 | Hardin | 42 17 20 N | 093 02 45 W |
| Frank Chapman Memorial Woods | Park | 378 | Cass | 41 25 50 N | 094 58 56 W |
| Frank Gotch State Park | Park | 319 | Humboldt | 42 40 37 N | 094 12 08 W |
| Frank Lloyd Wright Stockman House | Building | 340 | Cerro Gordo | 43 09 11 N | 093 11 34 W |
| Frank Phillips Visitors Information Center | Building | 397 | Union | 41 02 45 N | 094 22 46 W |
| Frank Pierce Post Office (historical) | Post Office | 244 | Johnson | 41 34 15 N | 091 44 01 W |
| Frank Starr Park | Park | 427 | Buena Vista | 42 38 20 N | 095 14 06 W |
| Franke Park | Park | 268 | Black Hawk | 42 24 20 N | 092 27 51 W |
| Frankel Ridge | Ridge | 312 | Boone | 41 57 10 N | 093 54 21 W |
| Frankfort (historical) | Populated Place | 394 | Montgomery | 41 01 58 N | 095 08 03 W |
| Frankfort Cemetery | Cemetery | 390 | Montgomery | 41 01 38 N | 095 07 59 W |
| Frankfort Post Office (historical) | Post Office | 394 | Montgomery | 41 01 58 N | 095 08 03 W |
| Franklin | Locale | 338 | Decatur | 40 47 50 N | 093 41 23 W |
| Franklin | Locale | 231 | Jasper | 41 32 33 N | 093 02 44 W |
| Franklin | Populated Place | 212 | Lee | 40 40 05 N | 091 30 41 W |
| Franklin Avenue Christian Church | Church | 296 | Polk | 41 36 41 N | 093 41 24 W |