Armstrong Township is located in Lycoming County, Pennsylvania. The Township building is at 502 Waterdale Road. The population was 717 at the 2000 census. It is part of the Williamsport, Pennsylvania Metropolitan Statistical Area.
Armstrong Township is in Lycoming County, PA. The population was 717 at the 2000 census. Armstrong Township is bordered by Duboistown, South Williamsport, and the West Branch Susquehanna River to the north.
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