The1965–66 season was the 51st in the history of theIsthmian League, an Englishfootball competition.
Leytonstone were champions, winning their ninth Isthmian League title.
| Season | 1965–66 |
|---|---|
| Champions | Leytonstone |
| Matches | 380 |
| Goals | 1,443 (3.8 per match) |
1966–67 → | |
| Pos | Team | Pld | W | D | L | GF | GA | GR | Pts |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Leytonstone | 38 | 27 | 7 | 4 | 98 | 33 | 2.970 | 61 |
| 2 | Hendon | 38 | 27 | 5 | 6 | 111 | 55 | 2.018 | 59 |
| 3 | Enfield | 38 | 24 | 8 | 6 | 104 | 54 | 1.926 | 56 |
| 4 | Wycombe Wanderers | 38 | 25 | 6 | 7 | 100 | 65 | 1.538 | 56 |
| 5 | Kingstonian | 38 | 24 | 5 | 9 | 94 | 55 | 1.709 | 53 |
| 6 | Wealdstone | 38 | 20 | 6 | 12 | 90 | 64 | 1.406 | 46 |
| 7 | Maidstone United | 38 | 19 | 6 | 13 | 74 | 61 | 1.213 | 44 |
| 8 | St Albans City | 38 | 19 | 5 | 14 | 57 | 56 | 1.018 | 43 |
| 9 | Sutton United | 38 | 17 | 7 | 14 | 83 | 72 | 1.153 | 41 |
| 10 | Tooting & Mitcham United | 38 | 16 | 7 | 15 | 65 | 58 | 1.121 | 39 |
| 11 | Corinthian-Casuals | 38 | 17 | 5 | 16 | 74 | 67 | 1.104 | 39 |
| 12 | Woking | 38 | 12 | 10 | 16 | 60 | 83 | 0.723 | 34 |
| 13 | Walthamstow Avenue | 38 | 12 | 9 | 17 | 81 | 75 | 1.080 | 33 |
| 14 | Oxford City | 38 | 10 | 9 | 19 | 49 | 72 | 0.681 | 29 |
| 15 | Barking | 38 | 10 | 7 | 21 | 51 | 72 | 0.708 | 27 |
| 16 | Bromley | 38 | 10 | 5 | 23 | 69 | 101 | 0.683 | 25 |
| 17 | Ilford | 38 | 7 | 10 | 21 | 50 | 84 | 0.595 | 24 |
| 18 | Hitchin Town | 38 | 6 | 8 | 24 | 57 | 118 | 0.483 | 20 |
| 19 | Clapton | 38 | 5 | 6 | 27 | 46 | 103 | 0.447 | 16 |
| 20 | Dulwich Hamlet | 38 | 5 | 5 | 28 | 30 | 95 | 0.316 | 15 |
| Club | Stadium |
|---|---|
| Barking | Mayesbrook Park |
| Bromley | Hayes Lane |
| Clapton | The Old Spotted Dog Ground |
| Corinthian-Casuals | King George's Field |
| Dulwich Hamlet | Champion Hill |
| Enfield | Southbury Road |
| Hendon | Claremont Road |
| Hitchin Town | Top Field |
| Ilford | Victoria Road |
| Kingstonian | Kingsmeadow |
| Leytonstone | Granleigh Road |
| Maidstone United | Gallagher Stadium |
| Oxford City | Marsh Lane |
| St Albans City | Clarence Park |
| Sutton United | Gander Green Lane |
| Tooting & Mitcham United | Imperial Fields |
| Walthamstow Avenue | Green Pond Road |
| Wealdstone | Grosvenor Vale |
| Woking | The Laithwaite Community Stadium |
| Wycombe Wanderers | Adams Park |
