- National Disabled Soldiers' League (Inc.), Select Committee to Investigate2
- National Forest Reservation Commission1
- National Monetary Commission2
- National Security League, Special Committee to Investigate7
- Naval Affairs Committee627
- Naval Affairs Committee, House84
- Nine-foot Channel from Great Lakes to the Gulf Select Committee1
- Northern Pacific Railroad Land Grants, Joint Committee on Investigation of1
- Oklahoma, Select Committee to Investigate Indian Contracts in2
- Old Age Pension Plans and Organizations, Select Committtee to Investigate, House1
- Ordnance and Ammunition, Select Committee on Investigation of1
- Pacific Islands and Porto Rico Committee6
- Patents Commitee177
- Patents Committee, House6
- Pensions Committee202
- Pensions Committee, House8
- Philippines Committee1
- Pointing Committee, House1
- Post Office and CUM Service Committee1
- Post Office and Civil Service Committee673