Marion County kan syfta på ett flertal countyn i USA. Alla av dem är uppkallade efter generalen Francis Marion.
Marion County, Alabama Marion County, Arkansas Marion County, Florida Marion County, Georgia Marion County, Illinois Marion County, Indiana Marion County, Iowa Marion County, Kansas Marion County, Kentucky Marion County, Mississippi Marion County, Missouri Marion County, Ohio Marion County, Oregon Marion County, South Carolina Marion County, Tennessee Marion County, Texas Marion County, West Virginia