Encyclopedias, Almanacs, Transcripts, and Maps
- Hemiptera (True Bugs, Cicadas, Leafhoppers, Aphids, Mealy Bugs, and Scale Insects)
- Henderson, Hazel (1933 – ) English/American Environmental Activist and Writer
- Hendry, Stephen Gordon
- Henotheism
- Herakles
- Herder, Johann Gottfried
- Heresy: An Overview
- Heresy: Christian Concepts
- Heritage Conservation and Recreation Service
- Hermes Trismegistos
- Hermetism
- Herod Agrippa I
- Herod Agrippa II
- Heroes
- Herons and Bitterns (Ardeidae)
- Herzegovina
- Hetch Hetchy Reservoir
- Heterodontiformes (Bullhead or Horn Sharks)
- Hevajra
- Hexactinellida (Glass Sponges)