Terrebonne Parish is a parish located in the southern part of the U.S. state of Louisiana. At the 2020 census, the population was 109,580. The parish seat is Houma. The parish was founded in 1822. Terrebonne Parish is part of the Houma-Thibodaux metropolitan statistical area.

Houma is the largest city in and the parish seat of Terrebonne Parish in the U.S. state of Louisiana. It is also the largest principal city of the Houma–Bayou Cane–Thibodaux metropolitan statistical area. The city's government was absorbed by the parish in 1984, which currently operates as the Terrebonne Parish Consolidated Government.