Dulac is a census-designated place (CDP) in Terrebonne Parish, Louisiana, United States.

As of the 2020 United States census, there were 1,241 people, 521 households, and 283 families residing in the CDP.

As of the census[6] of 2000, there were 2,458 people, 768 households, and 609 families residing in the CDP.

There were 1,063 housing units at an average density of 49.6 per square mile (19.2/km2).

16.0% of all households were made up of individuals, and 7.6% had someone living alone who was 65 years of age or older.