Millerstown is an unincorporated community and census-designated place (CDP) in Blair County, Pennsylvania, United States.

[2] The CDP is in southeastern Blair County, southeast of the center of North Woodbury Township, in the Morrisons Cove region of the county.

It is 3 miles (5 km) southeast of the borough of Martinsburg.

Middle Run flows eastward through the northern part of Millerstown.

This Blair County, Pennsylvania state location article is a stub.