- Cathedral of St. Paul, Construction Letters, 1907-1915 (1429)
- Catherine Azora-Minda Audio Tapes (46)
- Central Files Records (110)
- Cereal Rust Laboratory Records (449)
- Channing Tobias Papers (68)
- Charles K. Ober Papers (1)
- Chicano Studies Records (43)
- Child Study Association of America Records (64)
- Child Welfare League of America Records (9)
- Chris Cinque Papers (6)
- Christopher Webber Hall Papers (22)
- City Maps (338)
- City of Minneapolis Archives (23)
- Clara Barton Diaries (5)
- Clarence E. Lund Papers (17)
- Classical Urdu Poetry (22)
- Cloquet Forestry Center Records (706)
- Close Associates Papers (105)
- Clyde H. Bailey Papers (25)
- College of Agriculture Records (182)
