The 1980–81 season was the 66th season of the
Isthmian League
The Isthmian League () is a regional Association football, football league covering Greater London, East of England, East and South East England, featuring mostly semi-professional clubs.
Founded in 1905 by amateur clubs in the London area, th ...
, an English
football
Football is a family of team sports that involve, to varying degrees, kick (football), kicking a football (ball), ball to score a goal (sports), goal. Unqualified, football (word), the word ''football'' generally means the form of football t ...
competition.
Slough Town were champions, winning their first Isthmian League title. Though, there was no promotion from the Isthmian League to the
Alliance Premier League
The National League of English Football Clubs is a professional football league in England that consists of 72 teams, divided equally between the National League (division), National League North and National League South. The National League ...
till 1985, at the end of the season two Premier Division clubs - Dagenham and Enfield were accepted to the APL. Billericay Town finished second in Division One achieving the second promotion in a row. Willesden folded at the end of the season.
Premier Division
The Premier Division consisted of 22 clubs, including 20 clubs from the
previous season and two new clubs, promoted from Division One:
*
Bromley
Bromley is a large town in Greater London, England, within the London Borough of Bromley. It is southeast of Charing Cross, and had an estimated population of 88,000 as of 2023.
Originally part of Kent, Bromley became a market town, charte ...
*
Leytonstone & Ilford
There was no relegation from the division this season after Dagenham and Enfield joined the Alliance Premier League.
League table
Stadia and locations
Division One
Division One consisted of 22 clubs, including 18 clubs from the
previous season and four new clubs:
Two clubs relegated from the Premier Division:
*
Oxford City
*
Tilbury
Tilbury is a port town in the borough of Thurrock, Essex, England. The present town was established as separate settlement in the late 19th century, on land that was mainly part of Chadwell St Mary. It contains a Tilbury Fort, 16th century fort ...
Two clubs promoted from Division Two:
*
Billericay Town
*
Lewes
Lewes () is the county town of East Sussex, England. The town is the administrative centre of the wider Lewes (district), district of the same name. It lies on the River Ouse, Sussex, River Ouse at the point where the river cuts through the Sou ...
League table
Stadia and locations
Division Two
Second Division consisted of 20 clubs, including 17 clubs from the
previous season and three new teams:
*
Dorking Town, joined from the
Athenian League
The Athenian League was an England, English amateur association football, football league for clubs in and around London. The league was originally to be called the Corinthian League,Athenian Football League minutes 1912-1921 (National Football ...
*
Harwich & Parkeston, relegated from Division One
*
Horsham
Horsham () is a market town on the upper reaches of the River Arun on the fringe of the Weald in West Sussex, England. The town is south south-west of London, north-west of Brighton and north-east of the county town of Chichester. Nearby to ...
, relegated from Division One
League table
Stadia and locations
References
{{DEFAULTSORT:1980-81 Isthmian League
Isthmian League seasons
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