State of Happiness (Norwegian: Lykkeland) is a Norwegian period drama television series about the discovery of oil in the North Sea, and subsequent growth of the petroleum industry in Stavanger, beginning in 1969. It is directed by Petter Næss and Pål Jackman, written by Mette Marit Bølstad and coproduced by NRK and Maipo Film. Its first season premiered on NRK1 in 2018, and is set during the years 1969 to 1972. Its second season, covering the years 1977 to 1980, premiered in 2022. A third season, covering the years 1987 to 1990, was ordered in October 2022, with filming commencing in March 2023 and Norwegian premiere on 29 October 2024.

The series has drawn comparisons to the American period drama Mad Men.