Catahoula is a census-designated place in St. Martin Parish, Louisiana, United States.

It is located outside the western boundary of the Atchafalaya River Basin, south of the town of Henderson.

[2] The 2019 census estimates determined 1,054 people lived in Catahoula, spread over a total area of 3.1 square miles (8.0 km2).

[2] The racial and ethnic makeup of the census-designated place was 99.1% non-Hispanic white, and 0.9% Asian.

The median household income was $52,417 and 11.5% of the population lived at or below the poverty line.