Újpest Football Club was first established in June 1885, which makes them the oldest Hungarian club still in existence. Over the years, they have been one of Hungary's most dominant sides, winning a large amount of domestic trophies. The team's fiercest rivals are Ferencváros. Due to the popularity and success they have enjoyed, the derby matches between the two clubs are amongst the most significant fixtures in the country.
During the 1920s and 1930s, the team experienced a golden era, which included league title wins in 1929–30, 1930–31, 1932–33, 1934–35 and 1938–39. Prior to these title wins, Újpest also reached four Hungarian Cup finals, although they were unsuccessful on each occasion. In both 1929 and 1939, the club lifted the Mitropa Cup and in 1930, they won the Coupe des Nations.
Altogether, Újpest have been crowned as league champions on 20 occasions, which makes them the third most successful team in the competition's history, behind Ferencváros and MTK Budapest. Their most recent league title came in 1997–98. They are also the third most successful side in the Magyar Kupa, having lifted the trophy eight times, with their most recent success coming in 2002. The team's best performance in a continental competition occurred in the 1973–74 edition of the European Cup, when they reached the semi final stage.
The list of notable players to have represented the club over the years includes names like Gyula Zsengellér, Károly Fogl, József Fogl and Ferenc Bene. However, Ferenc Szusza is perhaps the side's most legendary player and he holds the records for most appearances and most goals scored for the team.
Újpest play their home matches at the Ferenc Szusza Stadium, which is named after their former player. The venue first opened in 1922 as Megyeri úti Stadion and was renovated after the turn of the 21st century. It is currently able to hold a maximum total of 13,501 supporters.