James City County is a county located in the Commonwealth of Virginia. As of the 2020 census, the population was 78,254. Although politically separate from the county, the county seat is the adjacent independent city of Williamsburg. Located on the Virginia Peninsula, James City County is included in the Virginia Beach-Norfolk-Newport News, VA-NC Metropolitan Statistical Area. It is often associated with Williamsburg, an independent city, and Jamestown which is within the county.