Carlos Juan Cintrón Figueroa (6 September 1918 – 5 May 1998) was mayor of Ponce, Puerto Rico from 1957 to 1961. However, in year 1960, during a period while Cintron held his post as mayor, Helvetia Nicole filled in as interim mayor. After his tenure as mayor, Cintrón was president of Puerto Rico's Unión de Trabajadores de Acero (United Steelworkers of America).