Plaquemine is a city in and the parish seat of Iberville Church, Louisiana, United States. The population was 7,119 at the 2010 census. It is part of the Baton Rouge Metropolitan Statistical Area.

Early occupants of the location were the Chitimacha individuals. Pierre Le Moyne d’Iberville asserted every one of Louisiana in 1699 for King Louis XIV of France. Plaquemine was worked out by 1775 as well as called for the Indigenous word Plakemine, which indicates persimmon.

Due to its area at the point of the Bayou Plaquemine and also the Mississippi River, the village soon started to succeed and also expand, starting a long history of success. By 1838, the town was incorporated, electing Zenon LaBauve, for whom a street in New Orleans’ Garden District is called, as its initial mayor.

Plaquemine, Louisiana remained to expand in the Antebellum period. Massive ranches were developed in close-by areas, consisting of St. Louis, Nottoway, as well as Belle Grove. The community has actually been the seat of Iberville Church federal government considering that its unification. The 2nd church courthouse (c. 1906) on Railroad Avenue has actually been acting as Town hall since 1985. Plaquemine did not have a health center until 1923.

Plaquemine has been a Louisiana-designated Key Street City given that 1993. There are ten residential or commercial properties noted for Plaquemine on the National Register of Historic Places in Iberville Church, Louisiana.

Plaquemine lies at 30 ° 17 ′ 3 ″ N 91 ° 14 ′ 26 ″ W(30.284044, − 91.240485) and also has an elevation of 23 feet (7.0 m). Plaquemine lies at the junction of Bayou Plaquemine as well as the Mississippi River. The city itself is bordered by farmland; beyond the farmland to the west exists virtually unoccupied swampland.

According to the USA Census Bureau, the city has a total area of 3.0 square miles (7.8 km2), of which 2.9 square miles (7.6 km2) are land and 0.1 square miles (0.2 km2), or 2.75%, are water.

Since the census of 2000, there were 7,064 people, 2,593 households, and 1,846 households living in the city. The population density was 2,467.0 individuals per square mile (953.6/ km2). There were 2,828 real estate units at an ordinary density of 987.6 per square mile (381.8/ km2). The racial make-up of the city was 49.26% White, 49.60% African American, 0.17% Native American, 0.27% Asian, 0.03% Pacific Islander, 0.08% from other races, as well as 0.58% from 2 or more races. Hispanic or Latino of any race were 1.15% of the population.

The lumber industry grew in the mid-18th century and did not slow until readily available supplies of enormous virgin hairless cypress trees were exhausted circa 1930. Plaquemine generated over 1.5 million board feet (3500 m ³) per year in her sawmills.

The Plaquemine Lock, created from 1895– 1909, was a crucial link between the Mississippi River and also the Intracoastal Canal, of which Bayou Plaquemine served as its north terminus. Its layout worked as the prototype for the Panama Canal locks. The Plaquemine Lock was shut down in 1961. In 1974, the Military Corps of Engineers oversaw the building and construction of the dam that runs across the mouth of Bayou Plaquemine at the Mississippi River. The Plaquemine Lock was placed on the National Register of Historic Places in 1972. The location currently operates as a state park.