Texas District 4 of the United States House of Representatives is a Congressional district that serves an area that includes some counties along the Red River north of the Dallas/Fort Worth Metroplex, including semi-rural Rockwall County and the large non-urbanized portion of Collin County. It also includes counties in East Texas such as Rains County. As of the 2000 census, District 4 represents 651,620 people who are predominantly Caucasian (80.8%) and middle-class (median family income is US$46,086, compared to $50,046 nationwide).