Calumet Plantation House, Historic plantation house in Patterson, Louisiana.

Calumet Plantation House is a house near Patterson, Louisiana, built around 1830 and enlarged between about 1850 and 1870, with further changes around 1950. It began as a cottage-sized dwelling and was converted into a large plantation house, which the National Register cited in 1984 as a successful example of that transformation.

Calumet Plantation House was built around 1830 as part of a forced-labor sugar plantation in St. Mary Parish. Between about 1850 and 1870 it was enlarged and converted from a cottage-sized dwelling into a large plantation house, and it was modified again around 1950. It was listed on the National Register of Historic Places in 1984.

The house was the centre of a forced-labour sugar plantation, and the 1984 National Register listing records that origin. Its name, Calumet, is the French word for a ceremonial pipe. The building itself shows the change from a cottage-scale dwelling to a large plantation house, a form tied to the sugar economy of St. Mary Parish.

The house stands near Patterson in St. Mary Parish, Louisiana, at coordinates 29.71167, -91.34444. The sources record no opening hours, tours or visitor facilities, so treat it as a private historic property seen from outside; confirm access locally before travelling.

The house was listed on the National Register of Historic Places in 1984, and the nomination itself cites it as a very successful conversion and major enlargement of an early nineteenth-century cottage-sized house into a mid-nineteenth-century large plantation house. That wording, rather than any single feature, is what earned the designation.