Blue Knob, Pennsylvania
Blue Knob is an unincorporated community and census-designated place in Blair County, Pennsylvania, United States. It was first listed as a CDP prior to the 2020 census.
The CDP is in southwestern Blair County, at the southern end of Juniata Township. It stands atop the Allegheny Front at elevation, approximately southeast of the Eastern Continental Divide. Pennsylvania Route 164 passes through the community, leading east down the Front to East Freedom and west to Portage. Knob Road leads south from the CDP to Blue Knob State Park, atop Blue Knob, the second-highest peak in Pennsylvania.