- Illinois Politics and Government (5)
- Immigrants Cultural Assimilation United States (1)
- Immigrants New York (State) New York (47)
- Indigenous People (1)
- Individual Organizations (32)
- Individual Project Files (12)
- Industrial Venereal Disease Projects (5)
- Injunction and Abatement (5)
- Institute on Man and Science (3)
- Institutional Care United States History Sources. Subject Source: Unspecified Ingested Source (9)
- Integration (3)
- Integration, Racial (31)
- Intergroup Relations (67)
- Intergroup Relations Subject Source: Unspecified Ingested Source (2)
- International Conference of Social Work (2)
- International Correspondence Files (96)
- International Federation of Settlements (95)
- International House (New York, Ny) (1)
- International Labour Office (1)
- International Materials (96)