Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Fenton | Populated Place | 378 | Kossuth | 43 13 11 N | 094 25 50 W |
| Fenton (historical) | Locale | 379 | Kossuth | 43 13 11 N | 094 25 41 W |
| Fenton Cemetery | Cemetery | 257 | Davis | 40 38 26 N | 092 30 07 W |
| Fenton City Hall | Building | 379 | Kossuth | 43 13 11 N | 094 25 41 W |
| Fenton Post Office | Post Office | 379 | Kossuth | 43 13 11 N | 094 25 41 W |
| Fenton Public Library | Building | 379 | Kossuth | 43 13 11 N | 094 25 41 W |
| Fenton Township Cemetery | Cemetery | 370 | Kossuth | 43 11 52 N | 094 21 14 W |
| Ferguson | Populated Place | 284 | Marshall | 41 56 13 N | 092 51 57 W |
| Ferguson (historical) | Locale | 278 | Marshall | 41 56 23 N | 092 51 56 W |
| Ferguson Cemetery | Cemetery | 383 | Sac | 42 18 51 N | 095 00 49 W |
| Ferguson Elementary School | School | 287 | Marshall | 41 56 09 N | 092 52 01 W |
| Ferguson Post Office | Post Office | 280 | Marshall | 41 56 17 N | 092 51 56 W |
| Ferguson-Fields Park | Park | 265 | Black Hawk | 42 30 23 N | 092 19 08 W |
| Ferkindstad Farm Cemetery | Cemetery | 362 | Winneshiek | 43 24 30 N | 092 00 03 W |
| Fern | Populated Place | 323 | Grundy | 42 29 05 N | 092 46 14 W |
| Fern Cliff Church | Church | 222 | Washington | 41 11 36 N | 091 36 42 W |
| Fern Cliff County Park | Park | 189 | Washington | 41 12 14 N | 091 36 36 W |
| Fern Cliff Evangelic Cemetery | Cemetery | 220 | Washington | 41 11 35 N | 091 36 41 W |
| Fern Creek | Stream | | Woodbury | 42 17 10 N | 095 53 22 W |
| Fern Post Office (historical) | Post Office | 323 | Grundy | 42 29 05 N | 092 46 14 W |
| Fern Valley Post Office (historical) | Post Office | 360 | Palo Alto | 43 00 43 N | 094 31 11 W |
| Fernald | Locale | 316 | Story | 42 04 15 N | 093 23 43 W |
| Fernald | Populated Place | 316 | Story | 42 04 15 N | 093 23 42 W |
| Fernald Post Office (historical) | Post Office | 316 | Story | 42 04 15 N | 093 23 42 W |
| Ferrel Cemetery | Cemetery | 221 | Henry | 40 56 47 N | 091 22 36 W |
| Ferrell-Ross Cemetery | Cemetery | 361 | Taylor | 40 38 30 N | 094 46 21 W |
| Ferry Landing Recreation Area | Park | 158 | Louisa | 41 09 48 N | 091 00 23 W |
| Ferry Post Office (historical) | Post Office | 227 | Mahaska | 41 14 48 N | 092 46 33 W |
| Ferry Slough | Channel | 186 | Clayton | 42 48 25 N | 091 05 06 W |
| Fertile | Populated Place | 357 | Worth | 43 15 52 N | 093 25 06 W |
| Fertile Community Center | Building | 357 | Worth | 43 15 52 N | 093 25 06 W |
| Fertile Fire Department | Building | 357 | Worth | 43 15 52 N | 093 25 06 W |
| Fertile Post Office | Post Office | 357 | Worth | 43 15 52 N | 093 25 06 W |
| Fertile Public Library | Building | 357 | Worth | 43 15 52 N | 093 25 06 W |
| Fessler Cemetery | Cemetery | 192 | Scott | 41 42 42 N | 090 25 05 W |
| Festina | Populated Place | 334 | Winneshiek | 43 07 10 N | 091 52 02 W |
| Festina Post Office | Post Office | 334 | Winneshiek | 43 07 10 N | 091 52 02 W |
| Fetter Island | Island | 158 | Des Moines | 40 49 36 N | 091 05 34 W |
| FFA Historical and Ag Museum | Building | 252 | Black Hawk | 42 18 49 N | 092 11 31 W |
| Fiddle Creek | Stream | | Cherokee | 42 39 44 N | 095 51 29 W |
| Fiddlers Creek | Stream | | Ringgold | 40 36 48 N | 094 19 08 W |
| Fiedler Cemetery | Cemetery | 227 | Davis | 40 51 40 N | 092 21 31 W |
| Fiedler Cemetery | Cemetery | 244 | Wapello | 40 54 45 N | 092 18 48 W |
| Fiedler School | School | 240 | Wapello | 40 54 48 N | 092 18 46 W |
| Field Cemetery | Cemetery | 336 | Clarke | 41 09 02 N | 093 51 39 W |
| Field House | Building | 254 | Dubuque | 42 30 14 N | 090 40 52 W |
| Field House | Building | 222 | Jefferson | 41 00 57 N | 091 57 52 W |
| Field House | Building | 217 | Johnson | 41 39 32 N | 091 32 48 W |
| Field of Dreams | Locale | 307 | Dubuque | 42 29 52 N | 091 03 14 W |
| Fielder Cemetery | Cemetery | 228 | Jefferson | 40 56 20 N | 091 49 31 W |
| Fielding | Populated Place | 426 | Cherokee | 42 39 47 N | 095 48 01 W |
| Fielding Post Office (historical) | Post Office | 426 | Cherokee | 42 39 47 N | 095 48 01 W |
| Fieldstone Park | Park | 369 | Cerro Gordo | 43 08 57 N | 093 21 49 W |
| Fierce (historical) | Locale | 344 | Decatur | 40 49 13 N | 093 49 23 W |
| Fierce Post Office (historical) | Post Office | 340 | Decatur | 40 49 30 N | 093 49 23 W |
| Fifes Grove County Park | Park | 343 | Ringgold | 40 44 13 N | 094 14 26 W |
| Fifield (historical) | Locale | 227 | Marion | 41 25 10 N | 093 02 31 W |
| Fifield Park | Park | 231 | Marion | 41 25 20 N | 093 02 31 W |
| Fifield Post Office (historical) | Post Office | 227 | Marion | 41 25 10 N | 093 02 31 W |
| Fifteen Mile (historical) | Locale | 272 | Tama | 42 16 45 N | 092 15 22 W |
| Fifteen Mile Post Office (historical) | Post Office | 322 | Tama | 42 17 05 N | 092 45 26 W |
| Fifth Avenue United Methodist Church | Church | 299 | Pottawattamie | 41 15 26 N | 095 52 16 W |
| Fifth Ward Park | Park | 221 | Jackson | 42 03 45 N | 090 40 25 W |
| Fiftyniner Motel and Campgrounds | Locale | 300 | Fremont | 40 45 18 N | 095 23 11 W |
| Filkins Grove Post Office (historical) | Post Office | 268 | Black Hawk | 42 24 30 N | 092 28 01 W |
| Fillenworth Beach | Beach | 426 | Dickinson | 43 22 15 N | 095 07 43 W |
| Fillmore | Populated Place | 254 | Dubuque | 42 19 09 N | 090 55 00 W |
| Fillmore (historical) | Locale | 254 | Dubuque | 42 19 09 N | 090 55 00 W |
| Fillmore Fairways Golf Course | Locale | 254 | Dubuque | 42 19 25 N | 090 54 30 W |
| Fillmore Post Office (historical) | Post Office | 254 | Dubuque | 42 19 09 N | 090 55 00 W |
| Fillmore Recreation Area | Park | 267 | Dubuque | 42 19 36 N | 090 54 36 W |
| Fillmore Schools | School | 224 | Linn | 41 58 39 N | 091 41 19 W |
| Filmore School | School | 223 | Scott | 41 35 38 N | 090 36 15 W |
| Finarty Cemetery | Cemetery | 285 | Marion | 41 15 30 N | 093 07 41 W |
| Finchford | Populated Place | 269 | Black Hawk | 42 37 38 N | 092 32 38 W |
| Finchford Cemetery | Cemetery | 280 | Black Hawk | 42 37 36 N | 092 32 23 W |
| Finchford Cemetey | Cemetery | 280 | Black Hawk | 42 37 36 N | 092 32 22 W |
| Finchford Community Church | Church | 270 | Black Hawk | 42 37 40 N | 092 32 31 W |
| Finchford Post Office (historical) | Post Office | 269 | Black Hawk | 42 37 38 N | 092 32 38 W |
| Findlay | Locale | 311 | Harrison | 41 31 42 N | 095 52 42 W |
| Findley | Populated Place | 311 | Harrison | 41 31 43 N | 095 52 45 W |
| Findley Cemetery | Cemetery | 321 | Montgomery | 40 57 28 N | 094 57 27 W |
| Findley Elementary School | School | 263 | Polk | 41 37 22 N | 093 37 01 W |
| Fine Arts Center | Building | 282 | Bremer | 42 43 37 N | 092 28 57 W |
| Fine Post Office (historical) | Post Office | 354 | Kossuth | 43 09 60 N | 094 10 01 W |
| Finis Post Office (historical) | Post Office | 216 | Henry | 40 56 43 N | 091 39 41 W |
| Finkbine Golf Course | Locale | 218 | Johnson | 41 39 40 N | 091 34 01 W |
| Finkbine Natatorium | Building | 430 | Buena Vista | 42 38 22 N | 095 12 41 W |
| Finley Cascade Medical Center | Hospital | 255 | Dubuque | 42 18 10 N | 091 00 24 W |
| Finley Cemetery | Cemetery | 218 | Henry | 41 05 30 N | 091 37 13 W |
| Finley Church | Church | 219 | Henry | 41 05 29 N | 091 37 13 W |
| Finley Hospital | Hospital | 274 | Dubuque | 42 29 47 N | 090 41 10 W |
| Finley Hospital Heliport | Airport | 269 | Dubuque | 42 29 45 N | 090 41 05 W |
| Finleys Landing Park | Park | 257 | Dubuque | 42 39 25 N | 090 49 20 W |
| Finn Pond Wildlife Area | Park | 324 | Greene | 42 01 60 N | 094 25 11 W |
| Finn Prairie Wildlife Area | Park | 377 | Wright | 42 52 15 N | 093 32 21 W |
| Fire Point | Cliff | 286 | Allamakee | 43 05 40 N | 091 10 50 W |
| Fire Services Education Building | Building | 281 | Story | 42 01 55 N | 093 38 24 W |
| Fire Station Museum | Building | 266 | Marion | 41 24 17 N | 092 54 56 W |
| Fire Station Number 3 | Building | 192 | Scott | 41 33 15 N | 090 34 04 W |
| Fire Station Number 4 | Building | 191 | Scott | 41 31 50 N | 090 32 06 W |
| Fire Station Number 5 | Building | 173 | Scott | 41 31 03 N | 090 36 15 W |
| Fire Station Number 6 | Building | 218 | Scott | 41 32 21 N | 090 36 06 W |
| Fire Station Number 7 | Building | 226 | Scott | 41 35 22 N | 090 36 33 W |
| First American Baptist Church | Church | 378 | Calhoun | 42 15 57 N | 094 44 01 W |
| First American Woman to Die in World War I Historical Marker | Park | 198 | Scott | 41 32 50 N | 090 33 10 W |
| First Apostolic Church | Church | 294 | Warren | 41 21 23 N | 093 35 31 W |
| First Assembly of God Church | Church | 259 | Black Hawk | 42 28 34 N | 092 24 11 W |
| First Assembly of God Church | Church | 403 | Carroll | 42 05 03 N | 094 52 38 W |
| First Assembly of God Church | Church | 386 | Cass | 41 23 20 N | 094 59 11 W |