Ch
- Chilkat, Sitka, Baranof Island, Sitka Borough, Alaska, USA
- Chilkat, Southeast, Haines Borough, Alaska, USA
- Chilkat, Southern, Haines Borough, Alaska, USA
- Chilkat Qwan, Inderstukha, Haines Borough, Alaska, USA
- Chilkat Qwan, Kar Qwan Ton, Haines Borough, Alaska, USA
- Chilkat Qwan, Katkwaahltu, Haines Borough, Alaska, USA
- Chilkat Qwan, Klukwan, Haines Borough, Alaska, USA
- Chilkat River, Haines Borough, Alaska, USA
- Chilkat River, Haines Division, Alaska, USA
- Chilkhat, Alaska, USA
- Chilko Lake Area, British Columbia, Canada
- Chilkoot, Haines Borough, Alaska, USA
- Chilkoot Lake, Haines Borough, Alaska, USA
- Chilkoot Lake Village, Haines Borough, Alaska, USA
- Chillan, Chile
- Chilliwack, British Columbia, Canada
- Chilliwack Area, British Columbia, Canada
- Chilliwack Lake, British Columbia, Canada
- Chimaltenango, Guatemala
- Chimborazo, Ecuador
- Chimbote, Ancash, Peru
- Chimbu, Papua New Guinea
- Chimesyan, Upper Skeena River, British Columbia, Canada
- China
- China Creek area, Canada, British Columbia, Canada
- China Hat, British Columbia, Canada
- Chincha, Ica, Peru
- Chinchero, Cuzco, Peru
- Chinchero, Peru
- Chinchero, Urubamba, Peru
- Chincheros, Apurimac, Peru
- Chinlac, British Columbia, Canada
- Chinle, Arizona, USA
- Chiripa, Bolivia
- Chitina, Alaska, USA
- Chitral, Northwest Frontier, Pakistan
- Choco, Colombia
- Choiseul, Solomon Islands
- Chongojape, Peru
- Chongqing, Sichuan, China
- Chongzhou, Sichuan, China
- Chordeleg, Azuay, Ecuador
- Chubut, Argentina
- Chuen Lung, Hong Kong, China
- Chugach Island, Kenai Peninsula Borough, Alaska, USA
- Chulucanas, Piura, Peru
- Chuquisaca, Bolivia
- Church House, British Columbia, Canada
- Churchill, Manitoba, Canada
- Chuuk, Federated States of Micronesia
- Chyeeke, Admiralty Island, Alaska, USA
CiCl
- Clallam County, Washington state, USA
- Clallam County, Washington, USA
- Clapsop Beach, Oregon, USA
- Clarence Sound, Alaska, USA
- Clayoquot, British Columbia, Canada
- Clayoqyath, Vancouver Island, British Columbia, Canada
- Clearwater, Florida, USA
- Clemclemaluts, British Columbia, Canada
- Clinton, British Columbia, Canada
- Clinton Airport Site, British Columbia, Canada
- Cloudcroft, New Mexico, USA
- Clyde River, Kanngiqtugaapik Nunavut, Canada
- Clyde River, Northwest Territories, Canada
- Clyde River, Nunavut, Canada
Co
- Coast, Kenya
- Coast, Oregon, USA
- Coast Between Yukon And Kuskokwim Rivers, Alaska, USA
- Coast central part of British Columbia, Canada
- Coban, Alta Verapaz, Guatemala
- Cochas, Ancash, Peru
- Cochiti Pueblo, New Mexico, USA
- Cod Island, British Columbia, Canada
- Coimbra, Portugal
- Cojata, Puno, Peru
- Cold Fish Lake, British Columbia, Canada
- Cold Fish Lake Area, British Columbia, Canada
- Cold Springs, Nevada, USA
- Coldwater, British Columbia, Canada
- Coli du Prairie, Minnesota, USA
- Colima, Mexico
- Colmonell, Scotland
- Cologne, Westphalia, Germany
- Colombia
- Colon, Panama
- Colorado, USA
- Colotenango, Huehuetenango, Guatemala
- Columbia, Connecticut, USA
- Columbia Lake, British Columbia, Canada
- Columbia Lake, Hot Springs, Fairmount, British Columbia, Canada
- Columbia River, British Columbia, Canada
- Columbia River, Oregon, USA
- Columbia River, Washington, USA
- Columbia River Region, Canada
- Columbia River Region, Oregon, USA
- Columbia River Region, Underwood Community, possibly, USA
- Columbia-Shuswap B, British Columbia, Canada
- Columbia-Shuswap F, British Columbia, Canada