Glencoe is a census-designated place (CDP) in St. Mary Parish, Louisiana, United States.

[2] It is part of the Morgan City Micropolitan Statistical Area.

Louisiana Highway 83 passes throughout the entire community and heads 9 miles (14 km) east to the town of Baldwin.

Louisiana Highway 318, which intersects with LA-83, heads 7 miles (11 km) northeast to intersect with Louisiana Highway 182 at the unincorporated community of Sorrel.

According to the United States Census Bureau, the CDP has a total area of 0.66 square miles (1.7 km2), all land.