Armstrong County, Pennsylvania

Armstrong County
County
Armstrong County Courthouse
Seal
Location within the U.S. state of Pennsylvania
Pennsylvania's location within the U.S.
Coordinates: 40°49′N 79°28′W / 40.81°N 79.46°W / 40.81; -79.46
Country	United States
State	Pennsylvania
Founded	March 12, 1800
Named for	John Armstrong
Seat	Kittanning
Largest borough	Kittanning
Area
• Total	664 sq mi (1,720 km2)
• Land	653 sq mi (1,690 km2)
• Water	11 sq mi (30 km2)  1.6%
Population  (2020)
• Total	65,558
• Density	100/sq mi (40/km2)
Time zone	UTC−5 (Eastern)
• Summer (DST)	UTC−4 (EDT)
Congressional district	15th
Website	www.co.armstrong.pa.us
Pennsylvania Historical Marker
Designated	October 15, 1982[1]

Armstrong County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 65,558.^[2] The county seat is Kittanning.^[3] The county was organized on March 12, 1800, from parts of Allegheny, Westmoreland and Lycoming Counties. It was named in honor of John Armstrong, who represented Pennsylvania in the Continental Congress and served as a major general during the Revolutionary War.

The county is part of the Greater Pittsburgh region of the state.^[a]

Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).