Juniata -- U.S. County in Pennsylvania Population (2000): 22821 Housing Units (2000): 10031 Land area (2000): 391.592840 sq. miles (1014.220756 sq. km) Water area (2000): 1.978718 sq. miles (5.124856 sq. km) Total area (2000): 393.571558 sq. miles (1019.345612 sq. km) Located within: Pennsylvania (PA), FIPS 42 Location: 40.556341 N, 77.342952 W Headwords: Juniata Juniata, PA Juniata County Juniata County, PA