Columbia is a city in Marion County, Mississippi, United States, which was formed six years before Mississippi was admitted to statehood. Columbia was named for Columbia, South Carolina, from which many of the early settlers had migrated. The population was 6,603 as of the 2000 census. It is the county seat of Marion County.
Columbia is located at 31°15′24″N 89°49′44″W / 31.25667°N 89.82889°W / 31.25667; -89.82889 (31.256781, -89.828779). It is located on the east bank of the Pearl River and is 81 miles south of Jackson, Mississippi and 103 miles north of New Orleans, Louisiana. According to the United States Census Bureau, the city has a total area of 6.4 square miles (16.5 km²), all land.
As of the census of 2000, there were 6,603 people, 2,497 households, and 1,620 families residing in the city. The population density was 1,033.5 people per square mile (399.0/km²). There were 2,821 housing units at an average density of 441.6 per square mile (170.5/km²). The racial makeup of the city was 62.56% White, 35.64% African American, 0.39% Native American, 0.44% Asian, 0.18% from other races, and 0.79% from two or more races. Hispanic or Latino of any race were 0.77% of the population.