# 1980–81 Isthmian League

The 1980–81 season was the 66th season of the Isthmian League, an English football 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 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
* Leytonstone & Ilford
There was no relegation from the division this season after Dagenham and Enfield joined the Alliance Premier League.

### League table

| Pos | Team | Pld | W | D | L | GF | GA | GD | Pts | Promotion or relegation |
| 1 | Slough Town | 42 | 23 | 13 | 6 | 73 | 34 | +39 | 82 | |
| 2 | Enfield | 42 | 23 | 11 | 8 | 81 | 43 | +38 | 80 | Joined the Alliance Premier League |
| 3 | Wycombe Wanderers | 42 | 22 | 9 | 11 | 76 | 49 | +27 | 75 | |
| 4 | Leytonstone & Ilford | 42 | 19 | 12 | 11 | 78 | 57 | +21 | 69 | |
| 5 | Sutton United | 42 | 19 | 12 | 11 | 82 | 65 | +17 | 69 | |
| 6 | Hendon | 42 | 18 | 10 | 14 | 66 | 58 | +8 | 64 | |
| 7 | Hayes | 42 | 18 | 8 | 16 | 45 | 50 | −5 | 62 | |
| 8 | Dagenham | 42 | 17 | 11 | 14 | 79 | 66 | +13 | 62 | Joined the Alliance Premier League |
| 9 | Harrow Borough | 42 | 16 | 11 | 15 | 57 | 52 | +5 | 59 | |
| 10 | Bromley | 42 | 16 | 9 | 17 | 63 | 69 | −6 | 57 | |
| 11 | Staines Town | 42 | 15 | 9 | 18 | 60 | 61 | −1 | 54 | |
| 12 | Tooting & Mitcham United | 42 | 15 | 8 | 19 | 49 | 53 | −4 | 53 | |
| 13 | Hitchin Town | 42 | 14 | 10 | 18 | 64 | 62 | +2 | 52 | |
| 14 | Croydon | 42 | 12 | 15 | 15 | 51 | 51 | 0 | 51 | |
| 15 | Dulwich Hamlet | 42 | 13 | 12 | 17 | 62 | 67 | −5 | 51 | |
| 16 | Leatherhead | 42 | 12 | 14 | 16 | 36 | 50 | −14 | 50 | |
| 17 | Carshalton Athletic | 42 | 14 | 8 | 20 | 57 | 82 | −25 | 50 | |
| 18 | Barking | 42 | 13 | 12 | 17 | 58 | 72 | −14 | 49 | |
| 19 | Harlow Town | 42 | 11 | 15 | 16 | 53 | 66 | −13 | 48 | |
| 20 | Walthamstow Avenue | 42 | 13 | 7 | 22 | 50 | 81 | −31 | 46 | |
| 21 | Boreham Wood | 42 | 10 | 13 | 19 | 46 | 69 | −23 | 43 | |
| 22 | Woking | 42 | 11 | 7 | 24 | 40 | 69 | −29 | 37 | |
* ↑ Barking were deducted two points.
* ↑ Woking were deducted three points.

## 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
Two clubs promoted from Division Two:
* Billericay Town
* Lewes

### League table

| Pos | Team | Pld | W | D | L | GF | GA | GD | Pts | Promotion or relegation |
| 1 | Bishop's Stortford | 42 | 30 | 6 | 6 | 84 | 28 | +56 | 96 | Promoted to the Premier Division |
| 2 | Billericay Town | 42 | 29 | 6 | 7 | 67 | 34 | +33 | 93 | Promoted to the Premier Division |
| 3 | Epsom & Ewell | 42 | 24 | 12 | 6 | 80 | 36 | +44 | 84 | |
| 4 | Farnborough Town | 42 | 23 | 11 | 8 | 75 | 39 | +36 | 80 | |
| 5 | St Albans City | 42 | 24 | 5 | 13 | 85 | 61 | +24 | 77 | |
| 6 | Kingstonian | 42 | 20 | 9 | 13 | 63 | 51 | +12 | 66 | |
| 7 | Oxford City | 42 | 18 | 9 | 15 | 71 | 48 | +23 | 63 | |
| 8 | Wokingham Town | 42 | 16 | 15 | 11 | 70 | 56 | +14 | 63 | |
| 9 | Metropolitan Police | 42 | 18 | 7 | 17 | 61 | 58 | +3 | 61 | |
| 10 | Chesham United | 42 | 17 | 7 | 18 | 64 | 64 | 0 | 58 | |
| 11 | Lewes | 42 | 17 | 7 | 18 | 72 | 83 | −11 | 58 | |
| 12 | Maidenhead United | 42 | 16 | 7 | 19 | 58 | 62 | −4 | 55 | |
| 13 | Walton & Hersham | 42 | 12 | 15 | 15 | 46 | 53 | −7 | 51 | |
| 14 | Hertford Town | 42 | 13 | 11 | 18 | 46 | 65 | −19 | 50 | |
| 15 | Hampton | 42 | 12 | 13 | 17 | 46 | 53 | −7 | 49 | |
| 16 | Aveley | 42 | 13 | 9 | 20 | 54 | 55 | −1 | 48 | |
| 17 | Wembley | 42 | 13 | 8 | 21 | 47 | 61 | −14 | 47 | |
| 18 | Clapton | 42 | 12 | 8 | 22 | 53 | 86 | −33 | 44 | |
| 19 | Ware | 42 | 9 | 13 | 20 | 50 | 69 | −19 | 40 | |
| 20 | Tilbury | 42 | 10 | 8 | 24 | 42 | 84 | −42 | 38 | |
| 21 | Camberley Town | 42 | 8 | 7 | 27 | 42 | 88 | −46 | 31 | Relegated to Division Two |
| 22 | Finchley | 42 | 6 | 11 | 25 | 35 | 77 | −42 | 29 | Relegated to Division Two |
* ↑ Kingstonian were deducted three points.
* ↑ Discordance between sources: fchd states that Tilbury were deducted three points, while rsssf doesn't.

## 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
* Harwich & Parkeston, relegated from Division One
* Horsham, relegated from Division One

### League table

| Pos | Team | Pld | W | D | L | GF | GA | GD | Pts | Promotion or relegation |
| 1 | Feltham | 38 | 24 | 10 | 4 | 65 | 30 | +35 | 82 | Promoted to Division One |
| 2 | Hornchurch | 38 | 25 | 6 | 7 | 74 | 35 | +39 | 81 | Promoted to Division One |
| 3 | Hungerford Town | 38 | 23 | 10 | 5 | 84 | 29 | +55 | 79 | |
| 4 | Barton Rovers | 38 | 19 | 11 | 8 | 61 | 26 | +35 | 68 | |
| 5 | Worthing | 38 | 19 | 11 | 8 | 74 | 43 | +31 | 68 | |
| 6 | Cheshunt | 38 | 19 | 11 | 8 | 57 | 33 | +24 | 68 | |
| 7 | Letchworth Garden City | 38 | 18 | 7 | 13 | 49 | 40 | +9 | 61 | |
| 8 | Southall | 38 | 14 | 11 | 13 | 48 | 52 | −4 | 53 | |
| 9 | Dorking Town | 38 | 13 | 12 | 13 | 47 | 45 | +2 | 51 | |
| 10 | Horsham | 38 | 16 | 3 | 19 | 47 | 47 | 0 | 51 | |
| 11 | Hemel Hempstead | 38 | 14 | 7 | 17 | 49 | 55 | −6 | 49 | |
| 12 | Egham Town | 38 | 13 | 9 | 16 | 45 | 62 | −17 | 48 | |
| 13 | Harwich & Parkeston | 38 | 12 | 11 | 15 | 57 | 58 | −1 | 47 | |
| 14 | Rainham Town | 38 | 11 | 13 | 14 | 44 | 45 | −1 | 46 | |
| 15 | Epping Town | 38 | 12 | 7 | 19 | 37 | 50 | −13 | 43 | |
| 16 | Eastbourne United | 38 | 11 | 10 | 17 | 59 | 75 | −16 | 43 | |
| 17 | Willesden | 38 | 11 | 8 | 19 | 57 | 68 | −11 | 41 | Folded at the end of the season |
| 18 | Tring Town | 38 | 11 | 6 | 21 | 40 | 71 | −31 | 39 | |
| 19 | Molesey | 38 | 4 | 9 | 25 | 31 | 83 | −52 | 21 | |
| 20 | Corinthian-Casuals | 38 | 1 | 8 | 29 | 17 | 95 | −78 | 11 | |