Nes Sóknar Ítróttarfelag Runavík, usually known more simply as NSÍ Runavík, or NSÍ, was founded back in March 1957. Within the Faroe Islands, the team have occasionally competed near the top of the league and have enjoyed some significant success over the decades. However, their status on the continental front has improved drastically since the turn of the 21st century. The club play in a distinctive yellow and black striped home kit.
The 1980s marked something of a golden era for NSÍ Runavík, as they reached the final of the Faroe Islands Cup in 1980, 1985, 1986 and 1988. Although they were unsuccessful on three of those occasions, they were able to lift the trophy in 1986, after beating LÍF Leirvik 3-1 in the final.
Further success followed for the side in the new millennium, with NSÍ overcoming HB Tórshavn in the 2002 Faroe Islands Cup final, in order to claim the trophy for the second time. The following year marked the team's debut in a major European competiton, as they featured in the qualification round of the UEFA Cup. After a failure in the 2004 Faroe Islands Cup final, the club achieved their greatest ever success in 2007, becoming league champions for the first time. Later in the year, they lifted the Faroe Islands Super Cup, before making their debut in the preliminary rounds of the UEFA Champions League in 2008.
Christian Høgni Jacobsen and Klæmint Olsen are amongst the most notable players to wear the NSÍ jersey. Jacobsen, who was pivitol in their 2007 league success, was the Faroe Islands Premier League's top scorer in 2005, 2006 and 2010, while Olsen achieved the same in 2013.
Most of the team's home matches are held at Runavík Stadium, which can hold up to 2,000 people. However, the venue does not meet UEFA's criteria for continental tournaments. As a result, European matches are played at either Svangaskarð or the national team's home stadium, Tórsvøllur.