2017–18 United Counties League

The 2017–18 United Counties League season (known as the 2017–18 ChromaSport & Trophies United Counties League for sponsorship reasons) was the 111th in the history of the United Counties League, a football competition in England.

The constitution for Step 5 and Step 6 divisions for 2017–18 was announced on 26 May 2017.

Premier Division
The Premier Division featured 19 clubs which competed in the division last season, along with three new clubs:
 * Daventry Town, promoted from Division One
 * St Andrews, transferred from the Midland League
 * Wellingborough Whitworth, promoted from Division One

Division One
Division One featured 16 clubs which competed in the division last season, along with four new clubs:
 * Harrowby United, relegated from the Premier Division
 * Huntingdon Town, relegated from the Premier Division
 * Lutterworth Town, promoted from the Leicestershire Senior League
 * Pinchbeck United, promoted from the Peterborough & District League