Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Floris Park | Park | 207 | Davis | 40 51 55 N | 092 19 51 W |
| Floris Post Office | Post Office | 211 | Davis | 40 51 54 N | 092 19 59 W |
| Flower School | School | 199 | Henry | 41 07 37 N | 091 39 48 W |
| Flowing Well County Park | Park | 337 | Hardin | 42 27 02 N | 093 22 56 W |
| Flowing Well Safety Rest Area | Locale | 345 | Wright | 42 43 52 N | 093 47 03 W |
| Floyd | Populated Place | 325 | Floyd | 43 07 40 N | 092 44 11 W |
| Floyd Boulevard Wesleyan Church | Church | 347 | Woodbury | 42 32 51 N | 096 21 05 W |
| Floyd Cemetery | Cemetery | 337 | Dubuque | 42 35 50 N | 090 58 50 W |
| Floyd Cemetery | Cemetery | 351 | Woodbury | 42 29 49 N | 096 22 33 W |
| Floyd Cemetery | Cemetery | 349 | Woodbury | 42 24 08 N | 096 12 46 W |
| Floyd Cemetery | Cemetery | 370 | Woodbury | 42 29 46 N | 096 22 23 W |
| Floyd City Hall | Building | 325 | Floyd | 43 07 40 N | 092 44 11 W |
| Floyd County | Civil | 328 | Floyd | 43 04 00 N | 092 47 01 W |
| Floyd County Courthouse | Building | 308 | Floyd | 43 03 55 N | 092 40 53 W |
| Floyd County Historical Society Museum | Building | 307 | Floyd | 43 03 46 N | 092 40 43 W |
| Floyd County Home | Building | 329 | Floyd | 43 05 60 N | 092 44 33 W |
| Floyd County Memorial Hospital | Hospital | 321 | Floyd | 43 03 09 N | 092 41 01 W |
| Floyd County Memorial Hospital Heliport | Airport | 323 | Floyd | 43 02 60 N | 092 41 01 W |
| Floyd County Sheriffs Department | Building | 308 | Floyd | 43 03 55 N | 092 40 53 W |
| Floyd Crossing | Populated Place | 327 | Floyd | 43 05 28 N | 092 44 32 W |
| Floyd M McDowell Commons | Building | 342 | Decatur | 40 37 05 N | 093 55 32 W |
| Floyd Park | Park | 325 | Floyd | 43 07 40 N | 092 44 11 W |
| Floyd Park | Park | 362 | Woodbury | 42 28 04 N | 096 22 26 W |
| Floyd Post Office | Post Office | 325 | Floyd | 43 07 40 N | 092 44 11 W |
| Floyd River | Stream | | Woodbury | 42 28 59 N | 096 23 30 W |
| Floyd River Trail | Trail | 337 | Woodbury | 42 31 42 N | 096 22 21 W |
| Floyd School | School | 357 | Dubuque | 42 35 16 N | 090 57 37 W |
| Floyd School | School | 373 | Woodbury | 42 30 48 N | 096 23 45 W |
| Floyd Station | Locale | 336 | Floyd | 43 08 24 N | 092 43 51 W |
| Floyd Township Cemetery | Cemetery | 426 | Sioux | 43 02 60 N | 095 53 21 W |
| Floyd Valley Golf Course | Locale | 364 | Woodbury | 42 28 15 N | 096 22 34 W |
| Floyd Valley Hospital | Hospital | 380 | Plymouth | 42 47 46 N | 096 09 20 W |
| Floyds Bluff | Cliff | 363 | Woodbury | 42 27 46 N | 096 22 40 W |
| Flugstad (historical) | Locale | 338 | Webster | 42 26 54 N | 093 56 01 W |
| Flugstad (historical) | Populated Place | 339 | Webster | 42 28 18 N | 093 56 14 W |
| Flugstad Post Office (historical) | Post Office | 338 | Webster | 42 26 55 N | 093 56 01 W |
| Flushing Post Office (historical) | Post Office | 348 | Ringgold | 40 51 20 N | 094 19 06 W |
| Fly Creek | Stream | | Polk | 41 21 18 N | 093 18 58 W |
| Flyers Airport | Airport | 251 | Black Hawk | 42 24 60 N | 092 15 01 W |
| Flying Green Acres Landing Strip | Airport | 312 | Dallas | 41 30 50 N | 094 00 11 W |
| Flying S Ranch Airport | Airport | 348 | Humboldt | 42 49 50 N | 094 00 42 W |
| Fockler Creek | Stream | | Butler | 42 36 21 N | 093 00 56 W |
| Folck Cemetery | Cemetery | 372 | Shelby | 41 37 15 N | 095 13 51 W |
| Foley Farm Cemetery | Cemetery | 223 | Jackson | 42 03 20 N | 090 51 01 W |
| Folger Post Office (historical) | Post Office | 321 | Clarke | 41 08 35 N | 093 41 11 W |
| Folgman Cemetery | Cemetery | 240 | Wapello | 41 01 30 N | 092 36 31 W |
| Folkerts Airport | Airport | 352 | Floyd | 43 08 35 N | 092 52 41 W |
| Follett Park | Park | 183 | Clinton | 41 45 03 N | 090 21 10 W |
| Folletts | Populated Place | 183 | Clinton | 41 44 55 N | 090 21 17 W |
| Folletts (historical) | Locale | 184 | Clinton | 41 45 02 N | 090 21 18 W |
| Folletts Post Office (historical) | Post Office | 184 | Clinton | 41 45 02 N | 090 21 18 W |
| Followers of Christ Church | Church | 333 | Harrison | 41 44 18 N | 095 42 10 W |
| Following the Mormon Trail in Cass County Historical Marker | Park | 360 | Cass | 41 18 23 N | 095 05 21 W |
| Folsom | Populated Place | 296 | Mills | 41 05 24 N | 095 49 03 W |
| Folsom (historical) | Locale | 296 | Mills | 41 05 24 N | 095 49 03 W |
| Folsom Lake | Lake | 292 | Mills | 41 05 04 N | 095 49 20 W |
| Folsom Post Office (historical) | Post Office | 296 | Mills | 41 05 24 N | 095 49 03 W |
| Folsom Wildlife Area | Area | 291 | Mills | 41 05 07 N | 095 49 15 W |
| Fonda | Locale | 370 | Pocahontas | 42 34 50 N | 094 50 53 W |
| Fonda | Populated Place | 372 | Pocahontas | 42 34 53 N | 094 50 46 W |
| Fonda City Hall | Building | 372 | Pocahontas | 42 34 54 N | 094 50 44 W |
| Fonda Golf Course | Locale | 372 | Pocahontas | 42 35 35 N | 094 50 51 W |
| Fonda Medical Clinic | Hospital | 372 | Pocahontas | 42 34 50 N | 094 50 47 W |
| Fonda Nursing and Rehabilitation Center | Hospital | 369 | Pocahontas | 42 35 10 N | 094 50 33 W |
| Fonda Opera House Museum | Building | 372 | Pocahontas | 42 34 51 N | 094 50 44 W |
| Fonda Post Office | Post Office | 372 | Pocahontas | 42 34 53 N | 094 50 46 W |
| Fonda Public Library | Building | 372 | Pocahontas | 42 34 54 N | 094 50 44 W |
| Fontana Cemetery | Cemetery | 302 | Buchanan | 42 36 17 N | 091 54 20 W |
| Fontana Lake | Reservoir | 299 | Buchanan | 42 35 15 N | 091 54 31 W |
| Fontana Milldam | Dam | 299 | Buchanan | 42 35 15 N | 091 54 31 W |
| Fontana Park | Park | 299 | Buchanan | 42 36 26 N | 091 54 43 W |
| Fontanelle | Populated Place | 411 | Adair | 41 17 23 N | 094 33 42 W |
| Fontanelle (historical) | Locale | 409 | Adair | 41 17 28 N | 094 34 06 W |
| Fontanelle Cemetery | Cemetery | 411 | Adair | 41 17 27 N | 094 32 25 W |
| Fontanelle City Fire Department | Building | 411 | Adair | 41 17 23 N | 094 33 42 W |
| Fontanelle Library | Building | 411 | Adair | 41 17 22 N | 094 33 50 W |
| Fontanelle Medical Center | Hospital | 411 | Adair | 41 17 23 N | 094 33 42 W |
| Fontanelle Police Department | Building | 411 | Adair | 41 17 22 N | 094 33 48 W |
| Fontanelle Post Office | Post Office | 411 | Adair | 41 17 22 N | 094 33 45 W |
| Fontanelle Town Hall | Building | 411 | Adair | 41 17 22 N | 094 33 48 W |
| Food Sciences Building | Building | 285 | Story | 42 01 37 N | 093 38 36 W |
| Foot and Ankle Clinic | Hospital | 438 | Buena Vista | 42 38 42 N | 095 11 21 W |
| Foot and Ankle Clinic | Hospital | 401 | Clay | 43 07 38 N | 095 08 57 W |
| Foot Clinic | Hospital | 402 | Shelby | 41 38 47 N | 095 20 18 W |
| Foote (historical) | Locale | 214 | Iowa | 41 31 00 N | 091 58 36 W |
| Foote Park | Park | 445 | Lyon | 43 18 32 N | 096 26 10 W |
| Foote Post Office (historical) | Post Office | 213 | Iowa | 41 31 00 N | 091 58 31 W |
| Forbes Cemetery | Cemetery | 195 | Louisa | 41 24 00 N | 091 24 51 W |
| Forbes Cemetery | Cemetery | 220 | Van Buren | 40 46 24 N | 091 56 22 W |
| Forbush | Populated Place | 299 | Appanoose | 40 46 08 N | 092 52 38 W |
| Forbush (historical) | Locale | 301 | Appanoose | 40 46 00 N | 092 52 41 W |
| Forbush Cemetery | Cemetery | 291 | Appanoose | 40 46 20 N | 092 52 41 W |
| Forbush Post Office (historical) | Post Office | 299 | Appanoose | 40 46 08 N | 092 52 38 W |
| Ford | Populated Place | 232 | Warren | 41 29 06 N | 093 23 19 W |
| Ford Cemetery | Cemetery | 254 | Keokuk | 41 12 54 N | 092 23 43 W |
| Ford Post Office (historical) | Post Office | 229 | Warren | 41 29 30 N | 093 23 01 W |
| Fordyce Cemetery | Cemetery | 229 | Van Buren | 40 50 00 N | 091 50 31 W |
| Foreman City Park | Park | 352 | Decatur | 40 37 45 N | 093 55 59 W |
| Forest Avenue Power Plant | Building | 287 | Polk | 41 36 16 N | 093 39 25 W |
| Forest Cemetery | Cemetery | 234 | Mahaska | 41 18 21 N | 092 38 01 W |
| Forest Chapel | Church | 300 | Jones | 42 03 05 N | 091 16 03 W |
| Forest City | Locale | 370 | Winnebago | 43 15 43 N | 093 38 01 W |
| Forest City | Populated Place | 383 | Winnebago | 43 15 45 N | 093 38 14 W |
| Forest City (historical) | Populated Place | 363 | Howard | 43 29 07 N | 092 14 18 W |
| Forest City Alternative School | School | 382 | Winnebago | 43 15 54 N | 093 38 45 W |
| Forest City Chiropractic and Sports Medicine Center | Hospital | 390 | Winnebago | 43 15 55 N | 093 38 16 W |
| Forest City Christian Elementary School | School | 378 | Winnebago | 43 16 34 N | 093 38 17 W |
| Forest City Christian High School | School | 371 | Winnebago | 43 16 15 N | 093 37 59 W |
| Forest City Country Club | Locale | 375 | Winnebago | 43 15 25 N | 093 37 41 W |
| Forest City Elementary School | School | 387 | Winnebago | 43 15 47 N | 093 39 15 W |