Cunha is a Galician and Portuguese surname of toponymic origin, documented since the 13th century.
Notable people having this surname include:
- Alvito D'Cunha, Indian footballer of Goan ethnicity.
- Diego Ribas da Cunha, Brazilian international footballer
- Domingos da Cunha, the Cabrinha, Portuguese Jesuit painter, early 17th century.
- José Gerson da Cunha (1844–1903); Indo-Portuguese physician, orientalist, historian and numismatist.
- Marco Aurélio Cunha dos Santos, better known as Marco Aurélio, (born 1967), Brazilian footballer.
- Nani, real name Luis Cunha, Portuguese international footballer.
- Nuno da Cunha, governor of Portuguese possessions in India from 1528 to 1538.
- Osvaldo Rodrigues da Cunha, Brazilian herpetologist.
- Pedro da Cunha, Portuguese naval commander c. 1544.
- Samuel Lopes da Cunha (1984) Brazilian footballer
- Tristão da Cunha (1460–1540); Portuguese explorer and naval commander
- Tristão de Bragança Cunha (1878–1938); Indian nationalist and anti-colonial activist from Goa