West Salem Township Mercer County was formed in 1805 and is located at the West end of Mercer County bordering on the Borough of Greenville. Currently, the Township has a population of 3538 as of the last U.S. Census. Assessed valuation of the land within the Township is $25,864,950 with millage set at 6.

West Salem Township has 46.48 miles of road.

The West Salem Township Supervisors will hold their regular monthly meetings dates and times as follows: 6 p.m. on April 14, June 9, August 11, October 13, December 8, 8 a.m. on May 12, July 14, September 8, November 10, 2026 at the West Salem Township Municipal Building, 610 Vernon Road, Greenville, PA

2026 Monthly Meeting Notice