The 2019 1. divisjon (referred to as OBOS-ligaen for sponsorship reasons) was a Norwegian second-tier football league season.

[2] On 20 October, Aalesund secured both promotion and league title with three games to spare by winning 1–0 away over Tromsdalen.

On 2 November, Sandefjord secured promotion to the first tier with one match to spare after their 1–0 win over Jerv at Komplett Arena.

[4] On the same day, Skeid were the second team to be relegated as their draw against Notodden meant that survival was out of reach before the ultimate round.

Start and Sandefjord were relegated from the 2018 Eliteserien, while Raufoss, Skeid and KFUM Oslo were promoted from the 2018 2. divisjon.