Production place
- Buchkirchen, Upper Austria3 objects
- Burslem, Stoke-on-Trent, Staffordshire, England4 objects
- CA-CCo-138, Oakley, Contra Costa County46 objects
- CA-Cal-13, Calaveras County, California1 objects
- CA-Col-1 (Miller Mound), Colusa County, California1 objects
- CA-Fre-67, Fresno County, California2 objects
- CA-Mrn-232 (Estero Mound), Drakes Bay, Marin County1 objects
- CA-SRI-147, Santa Rosa Island, Channel Islands3 objects
- CA-Sha-20, Shasta County, California3 objects
- CA-Sha-21, Shasta County, California1 objects
- Caere (ancient Cerveteri), Lazio, Central Italy1 objects
- Caesarea Paneas (ancient city), Trachonitis1 objects
- Caesareia (ancient city), Cappadocia4 objects
- Calaveras Big Trees State Park, Calaveras County, California1 objects
- Calcutta mint (historic place), Kolcata, India1 objects
- Cales (ancient name) Campania, Italy1 objects
- Cales (ancient place)1 objects
- California18 objects
- Camp Creek, Humboldt County, California1 objects
- Camp Richardson, El Dorado County, California3 objects