A football league is an organized competition where various teams play against each other in the sport of football. These leagues can be professional or amateur and are typically structured in a way that teams earn points based on their performance in matches. The team with the most points at the end of the season is often crowned the champion. Leagues can vary in size and format, with some featuring promotion and relegation systems, where the best teams move up to a higher division and the lowest-performing teams drop down. Popular examples of football leagues include the English Premier League and La Liga in Spain.