Natchez is the county seat and only city of Adams County, Mississippi, United States. Natchez has a total population of 15,792 (as of the 2010 census). Located on the Mississippi River across from Vidalia in Concordia Parish, Louisiana, Natchez is some 90 miles (140 km) southwest of Jackson, the capital of Mississippi, and 85 miles (137 km) north of Baton Rouge, the capital of Louisiana. It is the 25th-largest city in the state. It is named for the Natchez tribe of Native Americans who inhabited much of the area during the French colonization period.