- National Resources, Committee on Conservation of4
- National Water Resources, Select Committee on56
- Naval Affairs Committee658
- Naval Affairs, Committee on30
- Nicaragua Canal Construction Committee1
- Nicaragua Canal, Construction of, Select Committee on4
- Nine-foot Channel from Great Lakes to the Gulf Select Committee4
- Nutrition and Human Needs, Select Committee on137
- Pacific Islands and Porto Rico Committee51
- Pacific Islands and Porto Rico, Committee on1
- Pacific Islands, Porto Rico, and Virgin Islands Committee2
- Pacific Railroads Committee12
- Patents Commitee63
- Pensions Committee5,435
- Pensions, Committee on3,425
- Philippines Committee23
- Philippines, Committee on the2
- Political Activities, Lobbying, and Campaign Contributions, Special Committee to Investigate2
- Post Office and Civil Service Committee223
- Post Office and Post Roads Committee199