The1970–71 season was the 56th in the history of theIsthmian League, an Englishfootball competition.
Wycombe Wanderers were champions, winning their third Isthmian League title. At the end of the seasonMaidstone United andWealdstone switched to theSouthern Football League.
| Season | 1970–71 |
|---|---|
| Champions | Wycombe Wanderers |
| Matches | 380 |
| Goals | 1,156 (3.04 per match) |
1971–72 → | |
| Pos | Team | Pld | W | D | L | GF | GA | GR | Pts | Results |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Wycombe Wanderers | 38 | 28 | 6 | 4 | 93 | 32 | 2.906 | 62 | |
| 2 | Sutton United | 38 | 29 | 3 | 6 | 76 | 35 | 2.171 | 61 | |
| 3 | St Albans City | 38 | 23 | 10 | 5 | 87 | 26 | 3.346 | 56 | |
| 4 | Enfield | 38 | 24 | 7 | 7 | 67 | 24 | 2.792 | 55 | |
| 5 | Ilford | 38 | 21 | 7 | 10 | 74 | 51 | 1.451 | 49 | |
| 6 | Hendon | 38 | 18 | 11 | 9 | 81 | 37 | 2.189 | 47 | |
| 7 | Barking | 38 | 20 | 4 | 14 | 89 | 59 | 1.508 | 44 | |
| 8 | Leytonstone | 38 | 17 | 10 | 11 | 68 | 50 | 1.360 | 44 | |
| 9 | Woking | 38 | 18 | 6 | 14 | 57 | 50 | 1.140 | 42 | |
| 10 | Walthamstow Avenue | 38 | 14 | 11 | 13 | 63 | 52 | 1.212 | 39 | |
| 11 | Oxford City | 38 | 13 | 10 | 15 | 51 | 48 | 1.063 | 36 | |
| 12 | Hitchin Town | 38 | 12 | 9 | 17 | 46 | 60 | 0.767 | 33 | |
| 13 | Wealdstone | 38 | 12 | 8 | 18 | 45 | 64 | 0.703 | 32 | Switched to theSFL Division One North |
| 14 | Tooting & Mitcham United | 38 | 11 | 9 | 18 | 44 | 66 | 0.667 | 31 | |
| 15 | Kingstonian | 38 | 11 | 8 | 19 | 53 | 71 | 0.746 | 30 | |
| 16 | Bromley | 38 | 10 | 6 | 22 | 34 | 77 | 0.442 | 26 | |
| 17 | Dulwich Hamlet | 38 | 7 | 10 | 21 | 30 | 66 | 0.455 | 24 | |
| 18 | Maidstone United | 38 | 7 | 6 | 25 | 42 | 84 | 0.500 | 20 | Switched to theSFL Division One South |
| 19 | Clapton | 38 | 5 | 7 | 26 | 33 | 101 | 0.327 | 17 | |
| 20 | Corinthian-Casuals | 38 | 2 | 8 | 28 | 23 | 103 | 0.223 | 12 |
| 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 |
