Grant County may refer to:
Places Australia County of Grant, Victoria
United States Grant County, Arkansas Grant County, Indiana Grant County, Kansas Grant County, Kentucky Grant County, Minnesota Grant County, Nebraska Grant County, New Mexico Grant County, North Dakota Grant County, Oklahoma Grant County, Oregon Grant County, South Dakota Grant County, Washington Grant County, West Virginia Grant County, Wisconsin
Other uses Grant County, Georgia, a fictional place in the works of Karin Slaughter
See also Grant Parish, Louisiana