Its name is in honor of John Marshall, famous Chief Justice of the United States.

Marshall County comprises the Albertville, AL Micropolitan Statistical Area, which is also included in the Huntsville-Decatur-Albertville, AL Combined Statistical Area.

Tennessee River As of the census of 2020, there were 97,612 people, 35,330 households, and 25,078 families residing in the county.

As of the census of 2010, there were 93,019 people, 35,810 households, and 25,328 families living in the county.

As of the census of 2000, there were 82,231 people, 32,547 households, and 23,531 families living in the county.

[15] According to the census[16] of 2000, the largest ancestry groups in Marshall County were English 68.2%, Scots-Irish 12.31%, Scottish 5.1%, Irish 4.22%, Welsh 2.3% and African 1.47%.

At the 2010 census:[17] Education is provided by Marshall County Schools.

Albertville, Arab, Boaz, and Guntersville have independent city-ran schools.

School districts include:[20] Marshall County is home to numerous outdoor recreation areas including Lake Guntersville State Park, Cathedral Caverns State Park, and Buck's Pocket State Park.