Ohio - Significance region: Local
| First English Lutheran Church |
| First Hancock County Courthouse |
| First Lutheran Church |
| First Methodist Church |
| First Methodist Episcopal Church |
| First Methodist Episcopal Church of Alliance, Ohio |
| First Methodist Episcopal-Holy Trinity Greek Orthodox Church |
| First National Bank and Trust Building |
| First National Bank Building |
| First National Bank Building |
| First National Bank Building |
| First National Bank Building |
| First National Bank Tower |
| First Presbyterian Church |
| First Presbyterian Church |
| First Presbyterian Church |
| First Presbyterian Church Of Maumee Chapel |
| First Presbyterian Church of Wapakoneta |
| First Reformed and First Lutheran Churches |
| First Unitarian Church Of Marietta |
| First United Methodist Church |
| First United Methodist Church |
| First United Methodist Church |
| First Universalist Church of Olmsted |
| Fisher, E.D., House |
| Fitz Randolph-Rogers House |
| Five Mile House |
| Fledderjohann, H. E., House, Doctor's Office and Summer Kitchen |
| Fleming-Hoffman Farm |
| Floral Hall |
| Floral Hall |
| Flory, Joseph, House |
| Foor-Alspach House |
| Ford, Edward, Plate Glass Company Employee Relations Building |
| Ford Motor Company Cincinnati Plant |
| Ford Motor Company Columbus Branch Assembly Plant |
| Forest City Bank Building |
| Forest City Brewery |
| Forest Glen Estates Historic District |
| Forest Hill Historic District |
| Forest Hill Park |
| Forest Hill Realty Sales Office |
| Forest Lawn Memorial Park |
| Formica Corporation-Crystal Arcade-Contemporary Arts Center Building |
| Forsythe-Puhl House |
| Fort Ball-Railroad Historic Disrict |
| Fort Hill |
| Fortified Hill Works |
| Fort Industry Square |
| Fort Meigs Aboriginal-33WO08-33WO445 |
| Fortner Mounds I, II |
| Fort Piqua Hotel |
| Fort, The |
| Foster, Claud, House |
| Foster-Gram House |
| Fostoria Downtown Historic District |
| Fostoria Mausoleum |
| Founders Hall, Heidelberg College |
| Fountain City Historic District |
| Fountain Hotel, The |
| Fourth Street Historic District |
| Fowler Center Historic District |
| Fowler's Mills Historic District |
| Fox Hollow |
| Fox-Pope Farm |
| Fox's Brewery-Diamond Wine Co. |
| Frances Apartment Building |
| Frank, Charles, House And Store |
| Frankfort Works Mound |
| Franklin Boulevard Historic District |
| Franklin Boulevard-West Clinton Avenue Historic District |
| Franklin College Building No. 5 |
| Franklin Historic District |
| Franklin Hotel |
| Franklin Park Conservatory |
| Franklinton Apartments at Broad and Hawkes |
| Franklinton Apartments at State and May |
| Franklinton Post Office |
| Franklin Township Hall |
| Frantz House |
| Fraser House |
| Frasier, Thomas T. and Wesley B. Houses |
| Frazee, Stephen, House |
| Fredericktown Presbyterian Church |
| Free Will Baptist Church Of Auburn |
| French, Garnet B., House |
| Freund-Heintz House |
| Fridley-Oman Farm |
| Friedlander, Abraham J., House |
| Friendly Grove |
| Froelich, John, House |
| Fuller-Bramley House |
| Fuller, Frances Ensign, House |
| Fuller House |
| Fulton Farm |
| Fulton Lodge No. 248 |
| Fulton-Presbyterian Cemetery |
| Gabel, Daniel, House |
| Gaensslen, Phillip, House |
| Gaetz Music House |
Data from United States Park Service and Wikidata
