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The 2017 Eliteserien Promotion/Relagetion play-offs was the 44th time a spot in the Eliteserien was decided by play-off matches between top tier and second level clubs.
At the end of the 2017 season, Aalesund and Viking were relegated directly to 2018 OBOS-ligaen, and were replaced by Bodø/Glimt and Start who were directly promoted.
The play-offs between Eliteserien and OBOS-ligaen have been held every year since 1972 with exceptions in 1994 and 2011. They take place for the two divisions following the conclusion of the regular season and are contested by the fourteenth-placed club in Eliteserien and the four clubs finishing below the automatic promotion places in OBOS-ligaen. The fixtures are determined by final league position – the first to knockout-rounds begins with the four teams in the OBOS-ligaen: 3rd v 6th and 4th v 5th, and the winner then play each other to determine who meet the Eliteserien club in the final.
Five teams entered a play-off for the last Eliteserien spot for the 2018 season. These were:
The four OBOS-ligaen teams first played a single game knockout tournament, with the winner (Ranheim) advancing to a two-legged tie against the Eliteserien team (Sogndal) for the 16th and final spot in the 2018 Eliteserien season. Ranheim won promotion to Eliteserien with a 1–1 on aggregate and a 5–4 win on penalties against Sogndal.
The third to sixth-placed teams took part in the promotion play-offs; these were single leg knockout matches, two semi-finals and a final. The winners, Ranheim, advanced to play the 14th placed team in Eliteserien over two legs in the Eliteserien play-offs for a spot in the top-flight next season.
| Mjøndalen | 3–1 | Ull/Kisa |
|---|---|---|
Gauseth  13' (pen.)Fredriksen 21'Pellegrino 40' | Report | Aalbu 38' |
| Ranheim | 1–0 | Sandnes Ulf |
|---|---|---|
| Lillebo 77' | Report |
| Mjøndalen | 1–2 | Ranheim |
|---|---|---|
| Pellegrino 61' | Report | Karlsen 16' Reginiussen 80' |
The 14th-placed team in Eliteserien, Sogndal, played a two-legged play-off against Ranheim, the winners of the OBOS-ligaen promotion play-offs, to decide who will play in the 2018 Eliteserien.
1–1 on aggregate. Ranheim won 5–4 on penalties.
| First round | Second round | Final round | ||||||||||||||
| 3 | Mjøndalen | 3 | ||||||||||||||
| 6 | Ullensaker/Kisa | 1 | ||||||||||||||
| 3 | Mjøndalen | 1 | ||||||||||||||
| 4 | Ranheim | 2 | ||||||||||||||
| 4 | Ranheim | 1 | ||||||||||||||
| 5 | Sandnes Ulf | 0 | ||||||||||||||
| 14 | Sogndal | 1 | 0 | 1(4) | ||||||||||||
| 4 | Ranheim (pen.) | 0 | 1 | 1 (5) | ||||||||||||
The Norwegian First Division, also called 1. divisjon and OBOS-ligaen, is the second-highest level of the Norwegian football league system. Each year, the top finishing teams in the 1. divisjon are promoted to the Eliteserien, and the lowest finishing teams are relegated to 2. divisjon.
The 2014 Tippeligaen was the 70th completed season of top division football in Norway. The competition began on 28 March 2014, two weeks later than in the previous season. A three-week summer-break in June was scheduled due to the 2014 FIFA World Cup, and the decisive match was played on 9 November 2014. Strømsgodset were the defending champions. Bodø/Glimt and Stabæk joined as the promoted clubs from the 2013 1. divisjon. They replaced Tromsø and Hønefoss who were relegated to the 2014 1. divisjon.
The 2016 Tippeligaen was the 72nd completed season of top-tier football in Norway. The competition began on 11 March 2016. Due to the 2016 UEFA European Championship, there was a break between the rounds played on 29 May and 3 July. The decisive matches of the home-and-away season were played on 6 November 2016. A promotion/relegation play-off between the third-from-bottom team of the Tippeligaen and the winner of the promotion play-offs of the 2016 1. divisjon was contested on 30 November and 4 December 2016.
The 2016 1. divisjon was a Norwegian second-tier football league season. The league was contested by 16 teams, and the top two teams were promoted to Tippeligaen, while the teams placed from third to sixth place played a promotion-playoff against the 14th-placed team in Tippeligaen to win promotion. The bottom four teams were be relegated to the 2. divisjon.
The 2017 1. divisjon was a Norwegian second-tier football league season.
The 2018 1. divisjon was a Norwegian second-tier football league season.
The 2016 Eliteserien Promotion/Relegation play-offs was the 43rd time a spot in the Eliteserien are decided by play-off matches between top tier and second level clubs.
The 2015 Eliteserien Promotion/Relegation play-offs was the 42nd time a spot in the Norwegian top flight was decided by play-off matches between top tier and second level clubs.
The 2014 Eliteserien Promotion/Relegation play-offs was the 41st time a spot in the Norwegian top flight was decided by play-off matches between top tier and second level clubs.
The 2013 Eliteserien Promotion/Relegation play-offs was the 40th time a spot in the Norwegian top flight was decided by play-off matches between top tier and second level clubs.
The 2012 Eliteserien Promotion/Relegation play-offs was the 39th time a spot in the Norwegian top flight was decided by play-off matches between top tier and second level clubs.
The 2010 Eliteserien Promotion/Relegation play-offs was the 38th time a spot in the Norwegian top flight was decided by play-off matches between top tier and second level clubs.
The 2018 Eliteserien Promotion/Relagetion play-offs was the 45th time a spot in the Eliteserien was decided by play-off matches between top tier and second level clubs. In the play-offs, five teams compete for one spot in the 2019 Eliteserien.
The 2009 Eliteserien Promotion/Relegation play-offs was the 37th time a spot in the Norwegian top flight was decided by play-off matches between top tier and second level clubs.
The 2019 1. divisjon was a Norwegian second-tier football league season.
The 2020 1. divisjon was a Norwegian second-tier football league season.
The 2019 Eliteserien Promotion/Relagetion play-offs is the 46th time a spot in the Eliteserien will be decided by play-off matches between top tier and second level clubs. In the play-offs, five teams compete for one spot in the 2020 Eliteserien.
The 2020 Eliteserien Promotion/Relegation play-offs was the 47th time a spot in the Eliteserien was decided by play-off matches between top tier and second-level clubs. In the play-offs, five teams competed for one spot in the 2021 Eliteserien.
The 2021 Norwegian First Division is a Norwegian second-tier football league season.
The 2022 Norwegian First Division is a Norwegian second-tier football league season.
