Wikipedia doesn’t have a history of Mill Run yet. The photos, dates and memories neighbors add here are how it gets written.
Mill Run is an unincorporated community and census-designated place (CDP) in Blair County, Pennsylvania, United States. It was first listed as a CDP prior to the 2020 census. The CDP is in western Blair County, south of the center of Logan Township. It is bordered to the east by the city of Altoona and is often considered a neighborhood of the city, even using Altoona's numbering system (including an 11th avenue, 14th avenue, and 15th avenue). The community is in the valley of Mill Run, a stream which comes off the Allegheny Front 2 miles (3 km) to the west and flows southeast, then south, to join Beaverdam Creek west of Hollidaysburg. It is near the Horseshoe Curve. Allegheny Reservoir is …
Intro from Wikipedia. Population: U.S. Census Bureau.
Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021). How TownRatings grades history →
From the Library of Congress (3) and U.S. Geological Survey historical maps. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.