Catania, Italy
Cayo Largo del Sur, Cuba
Cebu City/Lapu-Lapu City, Philippines
Chandigarh, India
Changchun, China
Changde , China
Changsha , China
Changzhi, China
Changzhou, China
Chapelco/San Martin de los Andes, Argentina
Charleroi, Belgium
Charleston, United States
Charlotte, United States
Chattogram , Bangladesh
Cheboksary, Russia
Chelyabinsk, Russia
Chengde, China
Chengdu, China
Chennai, India
Chenzhou, China
Cherepovets, Russia
Chiang Mai, Thailand
Chiang Rai, Thailand
Chicago, United States
Chifeng, China
Chita, Russia
Chizhou, China
Chişinău, Moldova
Chongqing, China
Christchurch, New Zealand
Cincinnati / Covington, United States
Ciudad de la Costa, Uruguay
Cleveland, United States
Cluj-Napoca, Romania
Coimbatore, India
Colombier-Saugnieu, Rhône, France
Colombo, Sri Lanka
Columbus, United States
Comodoro Rivadavia, Argentina
Con Dao, Vietnam
Conakry, Guinea
Concepcion, Chile
Copenhagen, Denmark
Cordoba, Argentina
Cork, Ireland
Cotonou, Benin
Cox's Bazar, Bangladesh
Crawley (London), United Kingdom