The Iranian League is a professional football league in Iran, officially known as the Persian Gulf Pro League. It was established in 2001 and is the top tier of Iranian football. The league features several teams competing for the championship title each season, with clubs like Persepolis and Esteghlal being among the most successful. The league operates on a system of promotion and relegation with the Azadegan League, which is the second tier of Iranian football. Matches are held throughout the year, and the league is known for its passionate fan base and competitive spirit. The Iranian League plays a significant role in the development of football in the country.