Immediately after the end of the
Second World War, the sports activities in Zemun were restored. By early 1945, a club
FK Maksim Divnić was formed, named in honour of a player with that name that played before the war and who died as
Partisan fighter during the war. After just a couple of played matches the club changed its name into
FK Sremac Zemun. By the end of that year another club is also formed in Zemun,
FK Sparta Zemun. On 20 October 1946, the two clubs were merged to form a new sports society whose football section was
FK Jedinstvo Zemun. By 1962, the club were promoted into the group East of the
Yugoslav Second League, which was divided back then into two geographical groups, East and West. It stayed at Second national level for two seasons, after which it returned into the Serbian republic league, Yugoslav third tier. In the late 1960s, the club struggled financially, and on February 23, 1969, it is merged with FK Galenika, a club sponsored by the
Galenika a.d., a pharmaceutical company located in Zemun. Under the new name
FK Galenika Zemun, and with new financial backing, the club soon returned to the higher leagues, winning promotion as soon as 1970 to the Yugoslav Second League. Coached by
Ivan Čabrinović, the club became one of the strongest teams in the second league, and after several times being close, it finally reached promotion to the
Yugoslav First League in 1982. In that same season, the club reached the semi-finals of the
1981–82 Yugoslav Cup where they lost against the cup winners
Red Star Belgrade. The club played in the
1982–83 Yugoslav First League however it finished bottom of the table subsequently relegated back to the Second League. On 1 January 1985, the club changed its name into the one that still carries nowadays,
FK Zemun. During the late 1980s, the club had fallen into the lower leagues, but after the stabilization of their financial situation the club began rising again. In 1990, after two consecutive promotions, the club was back in the
1990–91 Yugoslav First League. This time the club stabilized in the top league and even managed to achieve good results, like fourth place in the
1992–93 First League of FR Yugoslavia, just behind the best Serbian clubs
Partizan,
Red Star and
Vojvodina, or the 5th place archive in the
1993–94 First League of FR Yugoslavia. In the 1992–93 season the club had reached again the semi-finals of the
Yugoslav Cup. FK Zemun competed in the top league all the way until 2007. In the season 2004–05 they managed to achieve 5th place once more. In 2007, Zemun competed in the
Serbian First League and came away with the 15th position and an automatic relegation to the
Serbian League Belgrade, third tier. FK Zemun played in the
2007–08 Serbian Cup and found its way to the final. The club won three matches after penalties, defeated two first league sides and goalie
Nemanja Jovšić was voted most valuable player. They lost the final 3–0 to Serbian team
Partizan but since Partizan had already qualified for the
Champions League Zemun were given the
UEFA Cup spot as they were the runners-up. During the summer, however, Zemun was not able to obtain a license from
UEFA and had to give their spot to fourth-placed side
Borac Čačak. Borac then gave their
Intertoto Cup spot to
OFK Beograd. In 2008–09, Zemun became the champion of
Serbian League Belgrade and were back to the
Serbian First League after only one season. In 2015–16, Zemun was promoted again to the Serbian First League. The following year after a bad start, they fired
Dragoljub Bekvalac and hired
Milan Milanović. ==Honours==