Dalmau is a Catalan given name (from Dalmatius) and surname. It may refer to:
Given name Dalmau Moner (died 1341), Catalan Dominican priest and saint Dalmau de Queralt, Count of Santa Coloma (died 1640), Catalan noble and viceroy
Surname Albert Dalmau (born 1992), Spanish footballer Christian Dalmau (born 1975), Puerto Rican basketball player Custo Dalmau (born 1959), Catalan fashion designer Gastón Dalmau (born 1983), Argentine actor and singer Jordi Dalmau (born 1989), Spanish motorcycle racer José Luis Dalmau (born 1966), Puerto Rican politician Juan Dalmau Ramírez (born 1973), Puerto Rican lawyer and politician Lluís Dalmau, Catalan painter of the 15th century Martín Dalmau, (born 1974) Argentine politician Raymond Dalmau (born 1948), Puerto Rican basketball player Ricardo Dalmau (born 1977), Puerto Rican basketball player Richie Dalmau (born 1973), Puerto Rican basketball player