The 2014 Lamar Hunt U.S. Open Cup Final was a soccer match played on September 16, 2014, at PPL Park in Chester, Pennsylvania. The match determined the winner of the 2014 U.S. Open Cup, a tournament open to amateur and professional teams affiliated with the United States Soccer Federation. This was the 101st edition of the oldest competition in United States soccer. Seattle Sounders FC won the match, defeating the Philadelphia Union. The crowd of 15,256 saw the teams go into extra time level at 1–1 before the Sounders scored twice more to end the match 3–1.

Seattle Sounders FC is an American professional men's soccer club based in Seattle, Washington, United States. The Sounders compete in Major League Soccer (MLS) as a member of the Western Conference. The club was established on November 13, 2007, and began play in 2009 as an MLS expansion team. The Sounders are a phoenix club, replacing the second-division franchise that played in the American Professional Soccer League (APSL), A-League, and USL First Division (USL-1) from 1994 to 2008, and carrying the same name as the original Sounders franchise that competed in the North American Soccer League (NASL) from 1974 to 1983.