The 2005–06 season was the 64th in the history of Eastern Counties Football League a football competition in England.
[1] Lowestoft Town were champions, winning their eleventh Eastern Counties Football League title, while Bury Town were promoted after ten seasons in the Eastern Counties Football League along with AFC Sudbury.
The Premier Division featured 19 clubs which competed in the division last season, along with three new clubs, promoted from Division One: Division One featured 17 clubs which competed in the division last season, along with five new clubs: