Encyclopedias, Almanacs, Transcripts, and Maps
- Income Gap
- Independence and Decolonization, Middle East
- Independence of Colonial Peoples
- Independence, Economic Impact of (Issue)
- Index Number Relativity
- Index of Prohibited Books
- India, Imperial
- Indian Appropriations Act
- Indian Army
- Indian General Allotment Act (Dawes Act) (1887)
- Indian National Movement
- Indian Ocean Trade
- Indian Removal Act of 1830
- Indian Reorganization Act of 1934
- Indian Reservations
- Indian Revolt of 1857
- Indian Treaties and Congresses
- Indian Wars
- Indiana, Virginia
- Indians in the Colonial Wars and the American Revolution