Crockett County is located in the U.S. state of Tennessee. As of the 2020 census, the population was 13,911. Its county seat is Alamo. Crockett County is included in the Jackson, TN Metropolitan Statistical Area.

The Jackson, Tennessee Metropolitan Statistical Area, as defined by the United States Census Bureau, is an area consisting of four counties - Madison, Chester, Gibson, Crockett - in western Tennessee, anchored by the city of Jackson. As of the 2020 census, the MSA had a population of 180,509.