Galliano is an unincorporated community and census-designated place (CDP) on the Bayou Lafourche in Lafourche Parish, Louisiana, United States. As of the 2010 census, the CDP population was 7,676. It is part of the Houma–Bayou Cane–Thibodaux Metropolitan Statistical Area.
Galliano is located in southern Lafourche Parish at 29°26′55″N 90°18′26″W (29.448539, -90.307274), on both sides of Bayou Lafourche. The community is bordered to the northwest by Cut Off and to the south by Golden Meadow.
Louisiana Highway 1 runs through the community along the west bank of Bayou Lafourche, while Highway 308 runs along the east side. There are two bridges across Bayou Lafourche within the CDP. Four-lane Highway 3235 runs through the west side of the community. All three highway lead northwest (upriver) 11 miles (18 km) to Larose and south 5 miles (8 km) to Golden Meadow. Thibodaux, the parish seat, is 45 miles (72 km) to the northwest up Highway 1, while Port Fourchon on the Gulf of Mexico is 26 miles (42 km) to the south. South Lafourche Leonard Miller Jr.