Retamal is a Spanish surname. Notable people with the surname include:
Daniel Retamal (born 1995), Chilean footballer Julio Retamal Favereau (1933–2025), Chilean historian, genealogist, and philosopher Oscar Retamal (born 1998), Argentine footballer Pol Retamal (born 1999), Spanish sprinter Víctor Retamal (born 1998), Chilean footballer
See also Retamal de Llerena, a municipality in the Spanish province of Badajoz Sergio Morales Retamal, mayor of the Chilean commune of Pichilemu in the 1950s
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