Carroll County is the name of thirteen counties in the United States of America. All except Carroll County, Tennessee, are named for Charles Carroll of Carrollton, a signer of the United States Declaration of Independence from Maryland:
- Carroll County, Arkansas
- Carroll County, Georgia
- Carroll County, Illinois
- Carroll County, Indiana
- Carroll County, Iowa
- Carroll County, Kentucky
- Carroll County, Maryland
- Carroll County, Mississippi
- Carroll County, Missouri
- Carroll County, New Hampshire
- Carroll County, Ohio
- Carroll County, Tennessee, named for William Carroll, the sixth and ninth governor of Tennessee
- Carroll County, Virginia
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