UMF Fjölnir is a handball team based in Reykjavik, Iceland. The team was founded in 1970 and has since become one of the most successful handball teams in Iceland. The team plays in the Icelandic Men's Handball League and has won several titles over the years.

The team's colors are blue and white, and their logo features a Viking helmet with wings. The team is known for its strong defense and aggressive style of play. They have a loyal fan base and play their home games at the Fjölnisvöllur arena in Reykjavik.

UMF Fjölnir has produced several notable players over the years, including Gudjon Valur Sigurdsson, who is considered one of the best handball players in Icelandic history. The team has also had success in international competitions, including the EHF Cup and the Challenge Cup.

Overall, UMF Fjölnir is a respected and successful handball team with a rich history and a bright future. They continue to be a dominant force in Icelandic handball and are a source of pride for their fans and the community.