Shelby County is the westernmost county in the U.S. state of Tennessee. As of the 2020 census, the population was 929,744. It is the largest of the state's 95 counties, both in terms of population and geographic area. Its county seat is Memphis, a port on the Mississippi River and the second most populous city in Tennessee. The county was named for Governor Isaac Shelby (1750–1826) of Kentucky. It is one of only two remaining counties in Tennessee with a majority African American population, along with Haywood County.

Memphis is a city in the U.S. state of Tennessee. It is the seat of Shelby County, in the southwesternmost part of the state, and is situated along the Mississippi River. With a population of 633,104 at the 2020 U.S. census, Memphis is the second-most populous city in Tennessee after Nashville.