Greensburg is a city in Westmoreland County, Pennsylvania and part of the Pittsburgh Metro Area. The city is named after Nathanael Greene, a major general of the Continental Army in the American Revolutionary War. Greensburg is the county seat of Westmoreland County, with a population of 15,889 people residing in the city, and a combined total of 57,255 people in the Greater Greensburg area. This article is a . You can help My English Wiki by expanding it.