Luis Manuel Carmelo Marengo Ramos (born 16 July 1973) is a retired Peruvian footballer who last played for Deportivo Coopsol in the Segunda División Peruana.
Marengo previously played for a number of clubs in Peru, including Alianza Lima, Sporting Cristal, Coronel Bolognesi and Cienciano.
Marengo has made 13 appearances for the senior Peru national football team from 1996 to 2003.