- 4 Hills, John
- 1 Hillside Mill
- 4 Hinckley Knitting Mills (Aaron Jones & Sons)
- 1 Hindu-Buddhism
- 1 Hinduism
- 3 Hinkle's Grist Mill
- 1 Hinsdale, Doyle & Co.
- 1 Hippopotamus amphibius (species)
- 1 Hirsh & Bro. Umbrellas Parasols
- 1 Hirst-Roger Carpet Mills
- 115 Historiated initials
- 469 Historic buildings
- 14 Historic districts
- 2 Historic farms
- 1 Historic house museums (buildings)
- 198 Historic houses
- 182 Historic landscapes
- 9 Historic monuments
- 42 Historic parks
- 1 Historic sites
- 4 Historic towns
- 1 Historic trees
- 5 Historical pageants
- 23 Historical parks
- 9 Historical societies
- 12 Histories
- 2 History (discipline)
- 1 Hitchcock Bros.
- 1 Hitchcock, Gilbert Monell (1859 – 1934)
- 1 Hitchcock's Dime Music
- 5 Hitching posts
- 7 Hitler, Adolf, 1889-1945
- 1 Hoboken, New Jersey
- 1 Hobson, Arthur, 1819-1904
- 1 Hoefnagel, Joris, 1542-1601
- 3 Hoes
- 7 Hoessrich & Woerffel
- 1 Hoessrich and Woerffel
- 1 Hoff, George J. Coal & Lumber Yard
- 1 Hoffman (Firm)
