1. deildin is the top tier of professional football in Iceland. Established in 1912, it features clubs from across the country competing for the championship title. The league operates on a promotion and relegation system with 2. deildin, the second tier of Icelandic football. The season typically runs from May to September, with each team playing 22 matches. The team with the most points at the end of the season is crowned the champion. 1. deildin is known for its competitive spirit and has produced several players who have gone on to represent Iceland at international levels.