The 1998–99 season was the 57th in the history of Eastern Counties Football League a football competition in England.
[1] Wroxham were champions for the third season in a row, winning their sixth Eastern Counties Football League title.
The Premier Division featured 20 clubs which competed in the division last season, along with two new clubs, promoted from Division One: Division One featured 15 clubs which competed in the division last season, along with three new clubs: