- 2 Forms (documents)
- 1 Formulas
- 1 Forney Press Building
- 1 Forrest Building
- 3 Forster, Eliza Ann Crosbie Colburn
- 43 Forster, John, 1812-1876
- 1 Fort Dix, New Jersey
- 1 Fort Donelson, Tennessee
- 1 Fort Jackson, Louisiana
- 1 Fort Mifflin (Philadelphia, Pa.)
- 1 Fort Pickens, Florida
- 1 Fort Saint Phillip, Louisiana
- 1 Fort Smith, Arkansas
- 3 Fort Sumter National Monument, South Carolina
- 2 Fort Warren
- 2 Fort Worth, Texas
- 1 Fort, Franklin W., 1880-1937
- 2 Fortescue, Julia, d. 1899
- 19 Fortieth Street
- 1 Fortresses
- 33 Forts & fortifications
- 1 Fortunes of War
- 6 Forty-Eighth Street
- 6 Forty-First Street
- 5 Forty-Fourth Street
- 8 Forty-Ninth Street
- 7 Forty-Second Street
- 4 Forty-Seventh Street
- 3 Forty-Sixth Street
- 1 Forty-Third Street
- 13 Forty-Third Street
- 1 Forum Theatre (Frankford Ave. & Granite St.)
- 1 Forzano Bros.
- 2 Foster, John G. (John Gray), 1823-1874
- 1 Fostoria, Ohio
- 1 Fotterall Building
- 3 Foulkrod Street
- 8 Founder's Week
- 47 Foundries
- 1 Fountain Abbey
