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 9 September 2023, Víkingur Reykjavík 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.

The Iceland 1. Deild Women is the second tier of women's football in Iceland, serving as a competitive league that showcases emerging talent and competitive teams striving for promotion to the top-flight Úrvalsdeild kvenna. Featuring a dynamic mix of established clubs and rising stars, the tournament offers exciting matches throughout the season, highlighting the growth and development of women's football in Iceland. With a focus on fostering local talent and promoting competitive excellence, the Iceland 1. Deild Women is a key stepping stone in Iceland's football hierarchy, contributing to the overall strength and popularity of the sport in the country.