- Invalid Pensions Committee, House197
- Irrigation Committee1
- Irrigation and Reclamation Committee86
- Irrigation and Reclamation Committee, House242
- Irrigation and Reclamation Committee, Senate230
- Irrigation and Reclamation of Arid Lands Committee46
- Irrigation of Arid Lands Committee112
- Jefferson, Thomas, Commission for Celebration of 200th Anniversary of Birth of1
- Judiciary Committee1,629
- Judiciary Committee, House1,765
- Judiciary Committee, Senate1,517
- Justice Department, Select Committee on Investigation of5
- Katyn Forest Massacre, Select Committee to Conduct Investigation of Facts, Evidence, and Circumstances of, House7
- Labor Committee101
- Labor Committee, House157
- Labor and Public Welfare Committee, Senate216
- Land and Water Policies of United States, Special Committee on Survey of, Senate1
- Langley, John W., Select Committee to Inquire into Qualifications of1
- Laoor and Public Welfare Committee, Senate4
- Laws13