Publisher
- Chemistry and Soils Bureau940
- Chemistry, Bureau of65
- Chesapeake and Delaware Canal Commission (War Department)1
- Chicago World's Fair Centennial Commission2
- Chickamauga and Chattanooga National Military Park Commission19
- Chickamauga and Chattanooga National Military Park Commission (War Department)1
- Chickamauga and Chattanooga National Park Commission18
- Chickamauga and Chattanooga National Park Commission (War Department)1
- Chief of Engineers1
- Chief of Ordnance10
- Child Development Office39
- Child Development Services Bureau11
- Child Labor Tax Division1
- Children's Bureau2,448
- Church Claims Board1
- Circuit Courts of Appeals1
- Citizenship Board (State Department)2
- Civil Aeronauctics Board21
- Civil Aeronautics Administration1,863
- Civil Aeronautics Authority240