Vidalia is the largest city and the parish seat of Concordia Parish, Louisiana, United States. The population was 4,299 as of the 2010 census.
Vidalia is located on the west bank of the Mississippi River at 31°34′6″N 91°26′3″W (31.568295, -91.434268) and has an elevation of 66 feet (20.1 m).
The city of Natchez, Mississippi, lies on the opposite bank of the river, connected by the Natchez–Vidalia Bridge, carrying U.S. Routes 65, 84, and 425.
According to the United States Census Bureau, the city has a total area of 2.6 square miles (6.7 km2), all land.
Vidalia was founded by Don José Vidal, when He was secretary to Manuel Gayoso de Lemos, the Spanish Governor of the Natchez District from 1792 to 1797, before the United States acquired it in the Louisiana Purchase of 1803. The Orleans Territorial legislature in 1811 changed the name of the city to Vidalia after its founder. Vidal had donated land along the river to the city, where its civic buildings were later constructed. He also donated land for the first school in Concordia Parish.
The Great Sandbar Duel, featuring Jim Bowie was a formal one-on-one duel that erupted into a violent brawl involving multiple combatants on September 19, 1827 and is one of the regional stories still told by local residents.
On July 14, 1863, shortly after the fall of Vicksburg and Port Hudson to Union forces, Confederate-controlled Vidalia was entered by 200 mounted infantrymen led by Major Asa Worden of the 14th Wisconsin Volunteer Infantry Regiment. This detachment captured the rear of Confederate General Edmund Kirby Smith's ordnance train on the Trinity Road, 15 miles (24 km) from the river. The Union forces took a large supply of muskets, cartridges, and ammunition.
The longest-serving sheriff of Concordia Parish was Eugene P. Campbell, who held the position from 1908 until his death in February 1940.