Eik Idrettsforening Tønsberg, usually called Eik-Tønsberg, is a Norwegian association football club from Eik, Vestfold. It was founded as Eik IF on 14 March 1928, and included the city name Tønsberg in 1989. Before 1988, the district Eik was located in Sem municipality, but Sem was incorporated into Tønsberg. Eik were promoted to the Norwegian Premier League in 1982, finished fifth in 1983, and were relegated in 1985.