Allen J. Ellender (September 24, 1890 - July 27, 1972) was a U.S. senator from Houma, Louisiana (Terrebonne Parish), who served from 1937 until his death. He was a Democrat who was originally allied with the legendary Huey P. Long, Jr.
Ellender was born in the town of Montegut in Terrebonne Parish. He attended public and private schools and graduated from St. Aloysius College in New Orleans in 1909, when he was only 19. He studied law at Tulane University in New Orleans. He was admitted to the bar in 1913 and launched his practice in Houma when he was 23. He was Catholic.