The 2011–12 season was the 52nd season in the history of NK Maribor and the club's 21st consecutive season in the Slovenian PrvaLiga since the league establishment in 1991. The team participated in the Slovenian PrvaLiga, Slovenian Football Cup, UEFA Champions League, and UEFA Europa League. The season covers the period from 1 June 2011 to 31 May 2012. Darko Milanič was a head coach of the club.
The 2011–12 season was one of the most successful in history of the club as Maribor won the domestic double, having won the league and cup title. In addition, Maribor became the first Slovenian club that qualified to the UEFA Europa League. They have also finished the season as runners-up of the 2011 Slovenian Supercup.
Supercup
The 2011 Slovenian Supercup was the seventh edition of the Slovenian Supercup, an annual football match contested by the winners of the previous season's Slovenian PrvaLiga and Slovenian Cup competitions. The match was played on 8 July 2011, in Ljudski vrt stadium between 2010–11 Slovenian PrvaLiga winners Maribor and 2010–11 Slovenian Football Cup winners Domžale. Both teams contested for their second Supercup title. The match was played by the best two teams of the 2010–11 season. During the course of that season Maribor was a league champion with Domžale being the only serious contender through most of the season, eventually finishing as runners up. The two teams were the only ones in the league that earned 20 or more victories, with Maribor achieving 21 and Domžale 20. In addition, both teams were part of the Slovenian cup final, held on Stožice stadium in Ljubljana and won by Domžale with the score 4–3 after regulation. The match is arguably one of the best cup finals ever held, since the competition was first introduced during the 1991–92 season.
Domžale won the 2011 Slovenian Supercup with the score 2–1 after regulation and became the most successful team in history of the competition as the only club with more than one victory. This was the second consecutive victory for Domžale over Maribor in domestic cup finals in five weeks, after winning the Slovenian cup in May 2011. Controversies arose at the end of the match as Zlatko Zahovič, Maribor's director of football, publicly stated that Maribor was not allowed to win and was disappointed with some of the main referee's decisions in second half, especially the one in 82nd minute when a clear penalty was not ruled in favour of his club. Maribor later made an official press statement expressing their concerns with the referees regarding the club's upcoming league season.
Colour key: Green = Maribor win; Yellow = draw; Red = opponents win.
Slovenian League
July–September
Maribor began their campaign at Ljudski vrt stadium on 16 July against Gorica, with Aleš Mertelj captaining his side after the absence of Marcos Tavares. A header from Aris Zarifović in the 67th minute put Gorica ahead but the home side responded late in the second half with the goals from Nebojša Kovačević (own goal) and Dejan Mezga, which were enough for the first win of the season. The team faced Nafta Lendava in their first away match of the season with Slovenia international goalkeeper, Jasmin Handanović, between the posts for the first time after his signing with the club. A late goal in the 88th minute from Nafta was merely a consolation, as Maribor was at the time already leading with two goals difference and the match eventually finished with the score 2–1. The result was identical in the next round when Maribor defeated Rudar Velenje at home, with all three goals being scored in the final twenty minutes of the game.