Houston County is a county located in the U.S. state of Tennessee. As of the 2020 census, the population was 8,283. Its county seat is Erin. The county was founded in 1871. It was named for Sam Houston.

The 7th congressional district of Tennessee is a congressional district located in parts of Middle and West Tennessee. It has been represented by Republican Mark E. Green since January 2019. The seventh district has significant suburban and rural areas. Although most of the area is rural, more than half of the district's vote is cast in either Montgomery County (Clarksville) or Williamson County.