Category:"Related ethnic groups" needing confirmation
- Caddo
- Cahuilla
- Cajun
- Californio
- Cambodian American
- Canadian of Lebanese origin
- Canadians of Dutch descent
- Canadians of German ethnicity
- Canadians of Guyanese descent
- Canadians of Laotian descent
- Canadians of Spanish descent
- Canadians of Trinidad and Tobago origin
- Canadians of Welsh descent
- Canarian people
- Cantabrian people
- Cape Verdean Guinea-Bissauan
- Caribou Inuit
- Castilian people
- Castizo
- Catalan people
- Cayuga nation
- Cayuse
- Cebuano people
- Chaga
- Chakhesang
- Cham people
- Chamorro people
- Chandraseniya Kayastha Prabhu
- Chaoui
- Chatino
- Chechen people
- Chelan (tribe)
- Chenouas
- Cherkes
- Cherokee
- Cheyenne
- Chichimeca Jonaz
- Chickasaw
- Chickasaw Nation
- Chilean American
- Chilean Brazilian
- Chilean Briton
- Chinese Australian
- Chinese Brazilian
- Chinese Canadian
- Chinese Cuban
- Chinese Filipino
- Chinese French