Marshall County is a county of the state of Alabama, United States. As of the 2020 census the population was 97,612. Its county seat is Guntersville. A second courthouse is in Albertville. Its name is in honor of John Marshall, famous Chief Justice of the United States. Marshall County is a dry county, with the exception of the five cities of Albertville, Arab, Grant, Guntersville, and Boaz. Marshall County comprises the Albertville, AL Micropolitan Statistical Area, which is also included in the Huntsville-Decatur-Albertville, AL Combined Statistical Area.

Albertville is a city in Marshall County, Alabama, United States, and is included in the Huntsville-Decatur Combined Statistical Area. The population was 22,386 at the 2020 census. It is the largest city in Marshall County.