Dulac is a census-designated place in Terrebonne Parish, Louisiana, United States. The population was 1,241 in 2020. It is part of the Houma–Bayou Cane–Thibodaux metropolitan statistical area. Dulac is located at 29°23′5″N 90°41′49″W / 29.38472°N 90.69694°W. According to the United States Census Bureau, the CDP has a total area of 26.4 s…Dulac is a census-designated place in Terrebonne Parish, Louisiana, United States. The population was 1,241 in 2020. It is part of the Houma–Bayou Cane–Thibodaux metropolitan statistical area. Dulac is located at 29°23′5″N 90°41′49″W / 29.38472°N 90.69694°W. According to the United States Census Bureau, the CDP has a total area of 26.4 square miles, of which 21.4 square miles is land and 5.0 square miles is water.