Beaumont is a city in and the county seat of Jefferson County, Texas, United States. With Port Arthur and Orange, it forms the Golden Triangle, a major industrial area on the Gulf Coast.Lamar University is based in Beaumont. Gulf States Utilities had its headquarters in Beaumont until its absorption by Entergy Corporation in 1993. GSU's Edison Plaza headquarters is still the tallest building in Beaumont (as of 2007). Since 1907, Beaumont has been home of the South Texas State Fair. In 2004, the venue for the Fair changed to Ford Park, a new, larger facility on the west end of Beaumont.