| CIO Office of the Secretary-Treasurer Records | Abstracts |
| CIO Washington Office Records | Abstracts |
| Citizens for a United Detroit Records | Abstracts |
| Civil Rights Congress of Michigan Records | Abstracts |
| Charles J. Clark Papers | Abstracts |
| Coalition of Labor Union Women Records | Abstracts |
| Coalition of Labor Union Women: San Francisco Chapter Records | Abstracts |
| Coalition of Labor Union Women: Seattle Chapter Records | Abstracts |
| Coalition of Black Trade Unionists Records | Abstracts |
| Alton Cobb Papers | Abstracts |
| Kenneth V. and Sheila M. Cockrel Papers | Abstracts |
| David Cohen Papers | Abstracts |
| Oscar Cohen Papers | Abstracts |
| Ronald Cohen Papers | Abstracts |
| Sanford Cohl Papers | Abstracts |
| Camille Colatosti Papers | Abstracts |
| John Cole Papers | Abstracts |
| John and Phyllis Collier Photographs | Abstracts |
| Virgil Collins Papers | Abstracts |
| Columbia Typographical Union No. 101 Records | Abstracts |
| Committee for National Health Insurance Records | Abstracts |
| Commonwealth College Records | Abstracts |
| Concerned Unionists Records | Abstracts |
| Joseph P. Conlin Papers | Abstracts |
| Alexander Cook Papers | Abstracts |
| Stanley Cook Papers | Abstracts |
| William Cook Papers | Abstracts |
| Elmer Cope Papers | Abstracts |
| Minnie F. Corder Papers | Abstracts |
| Frank Cormier and William Eaton Papers | Abstracts |
| Edward Cote Papers | Abstracts |
| Andrew Court Papers | Abstracts |
| Leon Cousens Papers | Abstracts |
| James G. Couser Papers | Abstracts |
| John Craft Papers | Abstracts |
| Harold Cranefield Papers | Abstracts |
| George Crockett Papers | Abstracts |
| Alexander Crosby Papers | Abstracts |
| Jack Crosby Papers | Abstracts |
| James D. Crowe Papers | Abstracts |
| John J. D'Agostino Papers | Abstracts |
| Franz E. Daniel Papers | Abstracts |
| David Tanzman Papers | Abstracts |
| William C. Davis Papers | Abstracts |
| Walter Day Papers | Abstracts |
| Len and Caroline DeCaux Papers | Abstracts |
| Democratic Socialist Organizing Committee (DSOC): John Mecartney Records | Abstracts |
| Detroit Allied Printing Trades Council Records | Abstracts |
| Detroit Coalition to End the War Now! Records | Abstracts |
| Detroit Committee To End The War In Vietnam Records | Abstracts |
