Firmaliga Winterthur

The Firmaliga Winterthur is an amateur football league in Winterthur, Switzerland. It was founded in 1979 and currently has 24 teams competing in two divisions. The top division is called the Nationalliga and the second division is called the Challenge League.

The league is open to all companies in Winterthur and the surrounding area. Each team must have a minimum of 11 players and a maximum of 18 players. The season runs from September to April, with each team playing each other team twice. The top two teams in the Nationalliga at the end of the season are promoted to the 2. Liga, while the bottom two teams are relegated to the Challenge League.