Production place
- CA-SRI-147, Santa Rosa Island, Channel Islands4 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
- Caipipendi, Bolivian Chaco, Bolivia2 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
- California21 objects
- Camp Creek, Humboldt County, California1 objects
- Camp Richardson, El Dorado County, California3 objects
- Campeche (city), Campeche, Mexico1 objects
- Campo (CDP), San Diego County, California1 objects
- Canada1 objects
- Cappadocia1 objects
- Carabaca, Hispania1 objects
- Caria, Anatolia, Turkey1 objects