Ligonier is a borough in Westmoreland County, Pennsylvania, United States. The population was 1,573 at the 2010 census. Ligonier was settled in the 1760s. The borough is well known for nearby Idlewild Park, one of the oldest amusement parks in the country, and nearby Seven Springs Mountain Resort. Another tourist attraction is Fort Ligonier Days, a parade and craft market that takes place every fall over the course of three days. Ligonier is part of the Pittsburgh Metropolitan Statistical Area.
Ligonier is the site of a reconstruction of Fort Ligonier, an example of a frontier fort of the French and Indian War. Ligonier is also known for its downtown square, the Diamond, which has a bandstand in the middle.