Nogometni klub IB 1975 Ljubljana, known simply as NK IB 1975 Ljubljana, is a Slovenian football club based in Ljubljana that competes in the Slovenian Third League, the third level of the Slovenian football system. They won the Slovenian Cup twice and the Slovenian Supercup once.
The club was founded in 1975 as NK Jeà ¾ica. In the next two decades they competed mostly in the Ljubljana League, which was the fifth or sixth level of Yugoslav football. After the independence of Slovenia the league was transformed into the intercommunal MNZ League, and the club was renamed to NK Factor Jeà ¾ica. They merged with nearby ÃÂrnuÃÂe in 1997 and therefore played in Slovenian Second League until 1999. Factor was then relegated to third level, where they stayed until 2004, when they won the centre zone and defeated Korte in promotion play-off. After returning to the second division, the club had to move their home matches to à ½à  D Ljubljana Stadium due to insufficient criteria of their home field.
Factor earned promotion to the Slovenian PrvaLiga in 2006, finishing first in the Slovenian Second League in the 2005âÂÂ06 season. In 2007, Joc PeÃÂeÃÂnik, one of the richest persons in Slovenia, took over NK Factor and renamed them to Interblock Ljubljana. At the end of the 2006âÂÂ07 season, Interblock came ninth and won a play-off series to remain in the Slovenian PrvaLiga, the first division of Slovenian professional football. In the 2007âÂÂ08 and 2008âÂÂ09 seasons, they won the Slovenian Cup. In 2008, they won the Slovenian Supercup, defeating the Slovenian champions Domà ¾ale.
In 2010, the club started to cooperate with NK Bravo and the team was renamed to IB Interblock. In the next year, the senior squads of both teams merged and they competed as Bravo1 Interblock in the Second League. In February 2012, PeÃÂeÃÂnik, who has left the club after the 2011âÂÂ12 season, intended to merge their youth selections with NK Bravo Publikum, but after the revolt from parents of the youth selections, the club has remained its own entity. The senior team withdrew from all competitions in 2012 but was reestablished in the 2015âÂÂ16 season.
League
Cup