Norwegian First Division
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1948–1951 (as 1. divisjon)
1951–1962 (as Landsdelsserien)
1963–1990 (as 2. divisjon)
1991–2004 (as 1. divisjon)
2005–2013 (as Adeccoligaen)
2014 (as 1. divisjon)
2015–present (as OBOS-ligaen)
|Number of teams||16|
|Level on pyramid||2|
|Domestic cup(s)||Norwegian Cup|
|TV partners||C More and TV2 Zebra|
|2017 Norwegian First Division|
OBOS-ligaen is a league in the second highest division of the Norwegian football league system. The league was established in 1948 following a reorganization of the Norwegian league system. From the 2015 season, it will be branded as OBOS-ligaen, after a six-year deal was agreed with the housing cooperative OBOS.
Formally, it was a semi-professional league.
- "PM: 1. divisjon blir OBOS-ligaen" [Press release: 1. divisjon becomes the OBOS league]. ToppFotball.no (in Norwegian). Norsk Toppfotball. 15 January 2015. Retrieved 15 January 2015.
- http://ekstranett.fotball.no/Documents/Kampdelegater/2010/Turneringsbestemmelser%20%20Adeccoligaen%202013.pdf[permanent dead link]
- "Tippeligaen utvides til 16 lag". Football Association of Norway (in Norwegian). 2008-03-08. Retrieved 2008-03-20.[dead link]
- Lars Aarhus. "First division 2017". RSSSF Norway. Retrieved 6 September 2017.