Trion is a town in Chattooga County, Georgia, United States. The population was 1,993 at the 2000 census. The estimated pop. as of 2006 is 2,001. Trion is the second largest incorporation is Chattooga County, which has a population of approximately 27,000. Trion is known as the denim capital of the world because of the Mount Vernon (formerly Riegel) manufacturing plant, which employs about 4000 people. The Chattooga River flows through the town.