1. deild kvenna, also known as Lengjudeild kvenna (English: The Lengja League) for sponsorship reasons, is the second-tier women's football league in Iceland. The league was founded in 1982. As of 1 October 2022, FH are the league's champions. The league features 10 teams; the top two finishers qualify for promotion to the Besta deild kvenna, while the bottom two are relegated to 2. deild kvenna. Two teams are relegated from the bottom group of the top-tier Besta deild kvenna to this league, and the top two teams from 2. deild kvenna are promoted into this league.

Island - 1. Deild - Kvinner er den nest øverste divisjonen for kvinnefotball på Island. Serien består av ti lag, og spillerne spiller 18 kamper hver. De to øverste lagene rykker opp til Úrvalsdeild Kvenna, mens de to nederste lagene rykker ned til 2. Deild Kvenna.