| Y 3.C 17 | Joint Commission on Plans for Extension and Completion of the Capitol Building (1904) |
| Y 3.C 33 | Central and South American Commission (1885-1886) |
| Y 3.C 33/2 | Central Statistical Board (1933-1940) |
| Y 3.C 33/3 | Central Housing Committee (1935-1942) |
| Y 3.C 33/4 | Central Statistical Committee (1935-1939) |
| Y 3.C 33/5 | Census of Partial Employment, Unemployment and Occupations (1937-1938) |
| Y 3.C 33/6 | Censorship Office (1941-1945) |
| Y 3.C 42/2 | U.S. Chemical Safety and Hazard Investigation Board (1990- ) |
| Y 3.C 43/2 | National Advisory Council on Child Nutrition (1971-1989) |
| Y 3.C 43/3 | U.S. National Commission on the International Year of the Child (1978-1980) |
| Y 3.C 43/4 | Interagency Panel on Early Childhood Research and Development |
| Y 3.C 43/5 | National Commission on Children (1987-1991) |
| Y 3.C 49 | Civilian Conservation Corps (1937-1939) |
| Y 3.C 49/2 | Civil War Centennial Commission (1957-1966) |
| Y 3.C 49/4 | Interagency Committee on Uniform Civil Rights Policies and Practices (1974) |
| Y 3.C 49/5 | Federal Interagency Council on Citizen Participation (1977-?) |
| Y 3.C 52 | Claims Commission (1871-1875) |
| Y 3.C 56 | Interagency Classification Review Committee (1976-1978) |
| Y 3.C 63 | Coal Commission (1922-1923) |
| Y 3.C 63/2 | Coastal Plains Regional Commission (1967-1981) |
| Y 3.C 63/3 | Commission on Fair Market Value Policy for Federal Coal Leasing (1983-1984) |
| Y 3.C 66 | Joint Commission on the Coinage (1965-1975) |
| Y 3.C 71 | Colorado River Interstate-Government Commission (1923) |
| Y 3.C 72 | Columbia Basin Interagency Committee (1946-1965) |
| Y 3.C 73 | Commodity Credit Corporation (1933-1939) |
| Y 3.C 73/2 | Combined Raw Material Board, United States and Great Britain (1942-1945) |
| Y 3.C 73/3 | Combined Production and Resource Board, United States, Great Britain and Canada (1942-1945) |
| Y 3.C 73/4 | Interim Compliance Panel (1972) |
| Y 3.C 73/5 | Commodity Futures Trading Commission (1974- ) |
| Y 3.C 73/6 | Competitiveness Policy Council (1991-1996) |
| Y 3.C 76 | Construction Industry Collective Bargaining Commission (1974-1978) |
| Y 3.C 76/2 | National Commission on Consumer Finance (1968-1972) |
| Y 3.C 76/3 | Consumer Product Safety Commission (1972- ) |
| Y 3.C 76/4 | Advisory Committee on the Records of Congress (1990- ) |
| Y 3.C 76/5 | Advisory Commission on Conferences in Ocean Shipping (1991-1992) |
| Y 3.C 78 | Coordinator for Industrial Cooperation (1935-1937) |
| Y 3.C 78/2 | Cooperative Enterprise in Europe Committee (1936- 1937) |
| Y 3.C 78/3 | Coordinator for Information (1941-1942) |
| Y 3.C 79 | National Commission on New Technological Uses of Copyrighted Works (1974- 1978) |
| Y 3.C 82 | Cost Accounting Standards Board (1970-1981) |
| Y 3.C 83 | Council of National Defense (1916-1918) |
| Y 3.C 83/2 | Office of the National Counterintelligence Executive (2001- ) |
| Y 3.C 83/3 | Office of Special Counsel |
| Y 3.C 86 | National Advisory Commission on Criminal Justice Standards and Goals (1971-1973) |
| Y 3.C 86/2 | National Critical Materials Council (1984-1991) |
| Y 3.C 88 | Commission for the Improvement of the Federal Crop Insurance Program (1988-1990) |
| Y 3.C 831 | Council of National Defense Advisory Commission (1940- 1941) |
