Marrero is a census-designated place and unincorporated community in Jefferson Parish, Louisiana, United States. Marrero is on the West Bank of the Mississippi River, within the Greater New Orleans Metropolitan area. The population was 36,165 at the 2000 census. Marrero apartments for rent comparison page shows most up to date rent information on Marrero apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.