where is new alexandria pennsylvania
New Alexandria, PA. Sponsored Topics. New Alexandria is a borough in Westmoreland County, Pennsylvania, United States. The population was 595 at the 2000 census. New Alexandria is located at 40Â°23â²50â³N 79Â°25â²25â³W / 40.39722Â°N 79.42361Â°W / 40.39722; -79.42361 (40.397254, -79.423591).