The Treadfirst Sudbury & District Sunday League

The Treadfirst Sudbury & District Sunday League is an amateur football league based in Sudbury and Haverhill, Suffolk, England. It was founded in 1921 and currently has over 100 member clubs.

The league is divided into three divisions: Premier Division, Division One, and Division Two. The top four teams in the Premier Division at the end of the season are promoted to the next level, while the bottom four teams are relegated.

The league also has a cup competition, the Treadfirst Sudbury & District Sunday Cup. The cup is open to all member clubs and is played in a knock-out format.