Borussia Verein für Leibesübungen 1900 e.V. Mönchengladbach, better known as Borussia Mönchengladbach (German: [boˈʁʊsi̯a mœnçn̩ˈɡlatbax] ) and colloquially known as just Gladbach, is a professional football club based in Mönchengladbach, North Rhine-Westphalia, Germany. They play in the Bundesliga, the top flight of German football. Nicknamed Die Fohlen [diː ˈfoːlən] (The Foals), the club has won five league titles, three DFB-Pokals and two UEFA Cup titles.

Borussia Mönchengladbach was founded in 1900, with its name derived from a Latinised form of Prussia, which was a popular name for German clubs in the former Kingdom of Prussia. The team joined the Bundesliga in 1965 and saw the majority of its success in the 1970s, where, under the guidance of Hennes Weisweiler and then Udo Lattek, a young squad with a fast, aggressive playing style was formed. During this period, Mönchengladbach won the Bundesliga five times, the UEFA Cup twice and reached a European Cup final in 1977.

Since 2004, Borussia Mönchengladbach have played at Borussia-Park, having previously played at the Bökelbergstadion since 1919. Based on membership, they are the fifth-largest club in Germany with over 75,000 members in 2016 and 93,000 as of 2021. The club's main rivals are 1. FC Köln, against whom they contest the Rheinland Derby. Their secondary rivals include Borussia Dortmund, Fortuna Düsseldorf and Bayer Leverkusen.