Westchester County Supreme Court Return to Directory Description Supreme CourtWebsite http://www.nycourts.gov/courts/9jd/westchester/westchestersupreme.shtmllPhone 914 824-5840Address 111 Martin Luther King Blvd. Westchester County CourthouseCity White PlainsNY10601Categories All, Government November 6, 2017 5:18 pm | by Mariel, Adult LibrarianDirectory Categories: All and Government.