1997–98 Isthmian League

The 1997–98 season was the 83rd season of the Isthmian League, which is an English football competition featuring semi-professional and amateur clubs from London, East and South East England. The league consisted of four divisions.

Premier Division
The Premier Division consisted of 22 clubs, including 18 clubs from the previous season and four new clubs:
 * Basingstoke Town, promoted as runners-up in Division One
 * Chesham United, promoted as champions of Division One
 * Gravesend & Northfleet, transferred from the Southern League
 * Walton & Hersham, promoted as third in Division One

Kingstonian won the division and were promoted to the Football Conference to reach the highest level in the club history. Yeading, Hitchin Town and Oxford City finished bottom of the table and relegated to the First Division.

Division One
Division One consisted of 22 clubs, including 16 clubs from the previous season and six new clubs: Three clubs relegated from the Premier Division:
 * Chertsey Town
 * Grays Athletic
 * Staines Town

Three clubs promoted from Division Two:
 * Leatherhead
 * Collier Row & Romford
 * Wembley

Before the start of the season Collier Row & Romford F.C. were renamed Romford.

Aldershot Town won the division and were promoted to the Premier Division along with Billericay Town and Hampton. Wokingham Town, Abingdon Town and Thame United relegated to Division Two.

Division Two
Division Two consisted of 22 clubs, including 16 clubs from the previous season and six new clubs:

Three clubs relegated from Division One:
 * Canvey Island
 * Marlow
 * Tooting & Mitcham United

Three clubs promoted from Division Three:
 * Braintree Town
 * Northwood
 * Wealdstone

Canvey Island won the division and returned to Division One straight after relegation from it along with Braintree Town and Wealdstone, both achieved the second promotions in two seasons. Tilbury relegated to Division Three along with Egham Town and Abingdon Town.

Division Three
Division Three consisted of 20 clubs, including 14 clubs from the previous season and six new clubs:

Three clubs relegated from Division Two:
 * Dorking
 * Hemel Hempstead
 * Ware

Plus:
 * Corinthian-Casuals, promoted as runners-up in the Combined Counties League
 * Croydon Athletic, promoted as third in the Spartan League
 * Ford United, promoted as champions of the Essex Senior League

Hemel Hempstead won the division and returned to Division Two straight after relegation along with Hertford Town and Harlow Town.