Jefferson Davis Parish (French: Paroisse de Jefferson Davis) is a parish located in the U.S. state of Louisiana. As of the 2010 census, the population was 31,594. The parish seat is Jennings. Jefferson Davis Parish is named after the president of the Confederacy during the American Civil War, Jefferson Davis. It is located in southwestern Louisiana and forms a part of the Acadiana region. In 2005, the parish was damaged significantly by Hurricane Rita, which caused much wind damage and flooding in the western part of the parish. The storm also caused Lacassine National Wildlife Refuge to be affected by saltwater intrusion.

Orange is a city and the county seat of Orange County, Texas, United States. As of the 2010 census, the city population was 18,595. It is the easternmost city in Texas, located on the Sabine River at the border with Louisiana, and is 113 miles (182 km) from Houston. Orange is part of the Beaumont−Port Arthur Metropolitan Statistical Area. Founded in 1836, it is a deep-water port to the Gulf of Mexico.

Port Arthur is a city in Jefferson County within the Beaumont–Port Arthur metropolitan area of the U.S. state of Texas. A small, uninhabited portion extends into Orange County. It is 90 mi (140 km) east of Houston. The largest oil refinery in the United States, the Motiva Refinery, is located in Port Arthur.The population of Port Arthur was 53,818 at the 2010 census, down from 57,755 at the 2000 census. Early attempts at settlements in the area had all failed. However, in 1895, Arthur Stilwell founded Port Arthur, and the town quickly grew. Port Arthur was incorporated as a city in 1898 and soon developed into a seaport. It eventually became the center of a large oil refinery network. The Rainbow Bridge across the Neches River connects Port Arthur to Bridge City. Port Arthur is vulnerable to hurricanes and extensive damage to the city has been caused several times.

Nederland ( NEE-dər-lənd) is a city in Jefferson County, Texas, United States. The population was 17,547 at the 2010 census.The city was settled in 1897 along what is now Boston Avenue and incorporated in 1940. It was settled by Dutch immigrants on land sold by the Kansas City Southern railroad. It is part of the Beaumont–Port Arthur metropolitan area. Nederland is also a part of an area known as "the Golden Triangle", which comprises Beaumont, Port Arthur, and Orange. The city is adjacent to the Jack Brooks Regional Airport.