Custo Dalmau (Catalan pronunciation: [ˈkustu ðəlˈmaw]; born 1959 as Ángel Custodio Dalmau Salmons in Tremp, Spain) is a Spanish fashion designer.^[1][2][3]

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He spent his childhood and adolescence in Barcelona, where he studied architecture.^{[citation needed]} In 1980, he founded the label Custo Line with his brother David which in 1996 became Custo Barcelona and today is a label of Blue Tower S.L., Barcelona. Initially focusing on printed tops and T-shirts inspired by the looks of Californian surfers, the label meanwhile has added a full range of women's clothing, a men's line, as well as shoes and accessories.^{[citation needed]}

Dalmau is married to Eva Vollmer who is responsible for the label's kids line Custo Growing.^{[citation needed] [citation needed]} Custo Dalmau is father to 2 daughters (one of which is not his biological daughter) and two sons. ^{[citation needed]} He spends his time between the family home in Barcelona and the USA.^[4][5]