Shelltown, Pennsylvania
Shelltown is an unincorporated community and census-designated place in Blair [County, Pennsylvania|Blair County], Pennsylvania, United States. It was first listed as a CDP prior to the 2020 United [States census|2020 census].
The CDP is in eastern Blair County, in the northern part of Woodbury [Township, Blair County, Pennsylvania|Woodbury Township]. It is bordered to the north by the borough of Williamsburg. Pennsylvania [Route 866] passes through the community, leading north into Williamsburg and southwest to Martinsburg.