- Readjustment of Service Pay Special Joint Committee2
- Real Estate Bondholders' Reorganizations, Select Committee to Investigate, House13
- Reclassification of Salaries Joint Commission5
- Reconstruction Finance Corporation, Select Committee to Investigate Loans Made by, Senate1
- Reconstruction and Production Select Committee5
- Reconstruction of House Roofs and Skylights, Special Committee on, House1
- Reconstruction of Senate Roof and Skylights, Special Committee on, Senate1
- Recruiting Bureau1
- Reduction of Nonessential Federal Expenditures Joint Committee1
- Reduction of Nonessential Federal Expenditures, Joint Committee20
- Reforestation Select Committee6
- Reorganization Joint Committee8
- Reorganization of Courts of United States and Reform Judicial Procedure, Special Committee to Study, Senate1
- Rivers and Harbors Committee274
- Rivers and Harbors Committee, House492
- Roads Committee26
- Roads Committee, House87
- Roanoke Colony Commission2
- Rock Creek Valley Parkway Commission1
- Rock Creek and Potomac Parkway Commission4