Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| First United Presbyterian Church | Church | 296 | Grundy | 42 19 21 N | 092 35 53 W |
| First United Presbyterian Church | Church | 229 | Louisa | 41 05 44 N | 091 15 17 W |
| First United Presbyterian Church | Church | 343 | Madison | 41 20 10 N | 094 00 58 W |
| First United Presbyterian Church | Church | 324 | Marshall | 42 00 51 N | 093 09 59 W |
| First Ward Park | Park | 214 | Jackson | 42 04 18 N | 090 39 44 W |
| First Wesleyan Church | Church | 314 | Floyd | 43 03 29 N | 092 40 59 W |
| First White Girl Born in Dickinson County Historical Marker | Park | 450 | Dickinson | 43 25 26 N | 095 07 18 W |
| First White Settlement in Union County Historical Marker | Park | 351 | Union | 41 03 00 N | 094 06 02 W |
| First White Settler in Clinton County Historical Marker | Park | 180 | Clinton | 41 52 20 N | 090 10 30 W |
| First White Settler in Webster City Historical Marker | Park | 316 | Hamilton | 42 27 34 N | 093 48 56 W |
| First White Woman in Prairie Rapids Historical Marker | Park | 265 | Black Hawk | 42 29 30 N | 092 21 29 W |
| First Woman Superintendent in a US Public School Historical Marker | Park | 204 | Scott | 41 32 20 N | 090 33 18 W |
| Firth Honor House | Building | 267 | Marion | 41 24 12 N | 092 55 09 W |
| Firth Street Church of Christ | Church | 342 | Cerro Gordo | 43 08 48 N | 093 11 51 W |
| Fiscus | Populated Place | 394 | Shelby | 41 44 20 N | 095 05 35 W |
| Fiscus Post Office (historical) | Post Office | 405 | Audubon | 41 44 20 N | 095 04 59 W |
| Fish Creek | Stream | | Henry | 40 51 08 N | 091 31 09 W |
| Fish Creek | Stream | | Mitchell | 43 13 31 N | 092 40 49 W |
| Fish Creek Bridge | Bridge | 186 | Henry | 40 51 16 N | 091 34 51 W |
| Fish Farms Mounds Wildlife Area | Park | 307 | Allamakee | 43 26 52 N | 091 16 56 W |
| Fish Lake | Lake | 177 | Jackson | 42 10 22 N | 090 17 52 W |
| Fish Lake | Stream | | Harrison | 41 36 35 N | 096 00 40 W |
| Fish Lake Wildlife Area | Park | 306 | Harrison | 41 34 40 N | 095 56 09 W |
| Fisher Cemetery | Cemetery | 267 | Jasper | 41 44 21 N | 093 15 04 W |
| Fisher Cemetery | Cemetery | 347 | Pottawattamie | 41 23 02 N | 095 41 21 W |
| Fisher Creek | Stream | | Fremont | 40 45 09 N | 095 26 01 W |
| Fisher Lake | Lake | 257 | Black Hawk | 42 32 08 N | 092 24 46 W |
| Fisher Lake | Swamp | 242 | Polk | 41 40 56 N | 093 39 28 W |
| Fisher School | School | 333 | Lucas | 40 56 27 N | 093 28 15 W |
| Fisher School | School | 299 | Marshall | 42 01 28 N | 092 55 12 W |
| Fisher Theater | Building | 275 | Story | 42 01 17 N | 093 38 16 W |
| Fisher-Nickell Hall | Building | 280 | Story | 42 01 27 N | 093 38 24 W |
| Fisk | Populated Place | 398 | Adair | 41 12 04 N | 094 31 41 W |
| Fisk Post Office (historical) | Post Office | 404 | Adair | 41 12 52 N | 094 32 32 W |
| Fitch Hall | Building | 287 | Polk | 41 36 13 N | 093 39 16 W |
| Fitz Riverbend Park | Park | 334 | Hardin | 42 31 23 N | 093 16 06 W |
| Fitzgerald Creek | Stream | | Winneshiek | 43 00 55 N | 091 40 47 W |
| Five Flags Theater | Building | 299 | Dubuque | 42 45 52 N | 090 39 57 W |
| Five Island Lake | Lake | 379 | Palo Alto | 43 08 60 N | 094 40 01 W |
| Five Island Lake State Game Management Area | Area | 372 | Palo Alto | 43 09 19 N | 094 39 05 W |
| Five Points | Populated Place | 300 | Dubuque | 42 33 05 N | 090 51 30 W |
| Five Ridge Prairie State Preserve | Park | 421 | Plymouth | 42 40 50 N | 096 31 51 W |
| Five Seasons Center | Building | 222 | Linn | 41 58 55 N | 091 40 16 W |
| Five Seasons Manufactured Home Community | Populated Place | 255 | Linn | 42 01 60 N | 091 41 21 W |
| Five Seasons Mobile Home Park | Populated Place | 280 | Black Hawk | 42 30 10 N | 092 24 35 W |
| Five Sullivan Brothers Memorial | Park | 259 | Black Hawk | 42 30 35 N | 092 20 02 W |
| Fivemile Creek | Stream | | Wayne | 40 54 01 N | 093 22 02 W |
| Fix Cemetery | Cemetery | 250 | Benton | 42 01 10 N | 091 55 31 W |
| Fix Wildlife Area | Park | 345 | Floyd | 43 10 08 N | 092 35 01 W |
| Fjelberg Cemetery | Cemetery | 314 | Story | 41 52 43 N | 093 35 60 W |
| Fjeldberg Lutheran Church | Church | 314 | Story | 41 53 38 N | 093 36 19 W |
| Flagler | Locale | 227 | Marion | 41 19 29 N | 093 01 19 W |
| Flagler | Populated Place | 227 | Marion | 41 19 29 N | 093 01 19 W |
| Flagler Post Office (historical) | Post Office | 227 | Marion | 41 19 29 N | 093 01 19 W |
| Flanagan Center | Building | 371 | Woodbury | 42 31 38 N | 096 25 39 W |
| Flanagan School | Locale | 283 | Dubuque | 42 36 34 N | 090 55 00 W |
| Flanders (historical) | Locale | 328 | Woodbury | 42 22 05 N | 096 15 36 W |
| Flanigan Brothers Grain Company Elevator | Locale | 343 | Monona | 42 10 30 N | 095 47 13 W |
| Flank Creek | Stream | | Warren | 41 13 54 N | 093 21 39 W |
| Flannery School (historical) | School | 232 | Clinton | 41 53 43 N | 090 10 30 W |
| Flat Lake | Lake | 177 | Jackson | 42 11 28 N | 090 20 42 W |
| Flatrock Creek | Stream | | Van Buren | 40 38 08 N | 091 47 48 W |
| Flatters Cemetery | Cemetery | 251 | Tama | 41 55 20 N | 092 21 57 W |
| Flattery School | School | 285 | Monroe | 41 02 02 N | 092 53 58 W |
| Flay Creek | Stream | | Cerro Gordo | 42 56 08 N | 093 24 11 W |
| Fleenor Cemetery | Cemetery | 290 | Appanoose | 40 51 50 N | 092 53 51 W |
| Flemingville Post Office (historical) | Post Office | 270 | Linn | 42 10 00 N | 091 29 59 W |
| Fletchall Creek | Stream | | Ringgold | 40 32 19 N | 094 21 07 W |
| Fletcher | Locale | 356 | Sac | 42 19 35 N | 094 58 28 W |
| Fletcher Branch | Stream | | Madison | 41 17 14 N | 094 05 32 W |
| Fletcher Cemetery | Cemetery | 311 | Lucas | 41 08 26 N | 093 29 36 W |
| Fletcher Ditch | Canal | 315 | Monona | 41 54 54 N | 096 06 03 W |
| Fleur Heights Care Center | Hospital | 281 | Polk | 41 32 23 N | 093 38 35 W |
| Flinders Area | Park | 454 | O'Brien | 42 58 50 N | 095 31 26 W |
| Flint Bottom Raceway | Locale | 173 | Des Moines | 40 51 20 N | 091 09 51 W |
| Flint Cemetery | Cemetery | 394 | Pottawattamie | 41 13 44 N | 095 11 04 W |
| Flint Creek | Stream | | Des Moines | 40 50 23 N | 091 05 58 W |
| Flint Hills Church of the Nazarene | Church | 210 | Des Moines | 40 48 52 N | 091 07 43 W |
| Flint Hills Golf Course | Locale | 191 | Des Moines | 40 51 50 N | 091 07 11 W |
| Flint Hills Park | Park | 200 | Des Moines | 40 51 36 N | 091 07 04 W |
| Flint Post Office (historical) | Post Office | 266 | Mahaska | 41 27 02 N | 092 45 16 W |
| Flint River Bridge | Bridge | 179 | Des Moines | 40 54 18 N | 091 13 21 W |
| Flint River Township Cemetery | Cemetery | 173 | Des Moines | 40 51 40 N | 091 09 11 W |
| Flock Cemetery | Cemetery | 298 | Jasper | 41 48 50 N | 093 11 11 W |
| Flood Creek | Stream | | Butler | 42 50 01 N | 092 42 55 W |
| Flood Creek Cemetery | Cemetery | 333 | Floyd | 43 02 21 N | 092 51 15 W |
| Flood Creek Hunting Preserve | Park | 338 | Floyd | 43 07 45 N | 092 55 01 W |
| Flood Creek Post Office (historical) | Post Office | 345 | Floyd | 43 07 35 N | 092 53 39 W |
| Floodwall Trail - North Section | Trail | 186 | Dubuque | 42 31 20 N | 090 39 01 W |
| Floodwall Trail - South Section | Trail | 183 | Dubuque | 42 29 02 N | 090 39 28 W |
| Flora Ellis Park | Park | 308 | Floyd | 43 04 24 N | 092 40 57 W |
| Flora Park | Park | 257 | Dubuque | 42 30 15 N | 090 42 20 W |
| Floral Hills Memorial Gardens Cemetery | Cemetery | 304 | Buchanan | 42 37 46 N | 091 54 38 W |
| Florence | Locale | 344 | Wright | 42 42 19 N | 093 49 09 W |
| Florence | Populated Place | 343 | Wright | 42 42 09 N | 093 49 07 W |
| Florence Bend | Bend | 296 | Pottawattamie | 41 21 04 N | 095 57 33 W |
| Florence Park | Park | 437 | Dickinson | 43 19 28 N | 095 09 27 W |
| Florence Post Office (historical) | Post Office | 169 | Louisa | 41 06 25 N | 091 07 01 W |
| Florence Post Office (historical) | Post Office | 344 | Wright | 42 42 19 N | 093 49 09 W |
| Florence Recreation Area | Park | 368 | Winnebago | 43 22 37 N | 093 50 60 W |
| Florenceville | Populated Place | 347 | Howard | 43 29 57 N | 092 07 58 W |
| Florenceville Bridge | Bridge | 341 | Howard | 43 29 45 N | 092 07 59 W |
| Florenceville Park | Park | 347 | Howard | 43 29 55 N | 092 08 01 W |
| Florenceville Post Office (historical) | Post Office | 347 | Howard | 43 29 57 N | 092 07 58 W |
| Florer Park | Park | 251 | Polk | 41 34 28 N | 093 43 21 W |
| Floris | Populated Place | 211 | Davis | 40 51 54 N | 092 19 59 W |
| Floris (historical) | Locale | 219 | Davis | 40 51 52 N | 092 19 36 W |
| Floris Baptist Church | Church | 211 | Davis | 40 51 54 N | 092 19 59 W |
| Floris City Hall | Building | 211 | Davis | 40 51 54 N | 092 19 59 W |
| Floris Fire Department | Building | 211 | Davis | 40 51 54 N | 092 19 59 W |