Estelle is a census-designated place in Jefferson Parish, Louisiana, United States. The population was 17,952 in 2020. It is part of the New Orleans–Metairie–Kenner metropolitan statistical area. Estelle is located south of Marrero; the urbanized areas of the communities meet, and some businesses in Estelle list their addresses as "Marrero". The Jean Lafitte National Park Barataria Preserve is adjacent to Estelle.