Rexach is a surname. Notable people with the surname include:
Carles Rexach (born 1947), Spanish footballer and manager Eduardo Serra Rexach (born 1946), Spanish politician and businessman Félix Benítez Rexach (1886–1975), Puerto Rican engineer and businessman Jaime Benítez Rexach (1908–2001), Puerto Rican author, academic, and politician Juan Rexach (fl. 1431–1482), Spanish painter and miniaturist Roberto Rexach Benítez (1929–2012), Puerto Rican politician Sylvia Rexach (1922–1961), Puerto Rican scriptwriter, poet, singer, and composer