Encyclopedias, Almanacs, Transcripts, and Maps
- Honko, Lauri
- Honthorst, Gerard
- Hoopoes (Upupidae)
- Hopkins, Emma Curtis
- Hornbills (Bucerotidae)
- Horner, I. B.
- Horns
- Horses, Zebras, and Asses (Equidae)
- Horseshoe Bats (Rhinolophidae)
- Horseshoe Crabs
- Horthy, Miklós Nagybánai
- Hospitaller
- house music
- Household Waste
- Howard, Henry
- Howitt, A. W.
- Howler Monkeys and Spider Monkeys (Atelidae)
- Hrotsvit
- Huangdi
- Huayan