Avinger is a town in Cass County, in the U.S. state of Texas. The population was 444 at the 2010 census, and 371 at the 2020 U.S. census. State Representative David Simpson, a Republican from Longview, served from 1993 to 1998 as the mayor of Avinger.

Cass County is a county located in the U.S. state of Texas. As of the 2020 census, its population was 28,454. The county seat is Linden. The county was named for United States Senator Lewis Cass (D-Michigan), who favored the U.S. annexation of Texas in the mid-19th century.