1998–99 United Counties League

The 1998–99 United Counties League season was the 92nd in the history of the United Counties League, a football competition in England.

Premier Division
The Premier Division featured 20 clubs which competed in the division last season, no new clubs joined the division this season.

Also, Mirrlees Blackstone changed name to Blackstones.

Division One
Division One featured 17 clubs which competed in the division last season, along with one new club:
 * Woodford United, joined from the Northamptonshire Combination League