The1958–59 season was the 44th in the history of theIsthmian League, an Englishfootball competition.
Wimbledon were champions, winning their fifth Isthmian League title. At the end of the seasonRomford switched to theSouthern Football League.
| Season | 1958–59 |
|---|---|
| Champions | Wimbledon |
| Matches | 240 |
| Goals | 1,009 (4.2 per match) |
1959–60 → | |
| Pos | Team | Pld | W | D | L | GF | GA | GR | Pts | Results |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Wimbledon | 30 | 22 | 3 | 5 | 91 | 38 | 2.395 | 47 | |
| 2 | Dulwich Hamlet | 30 | 18 | 5 | 7 | 68 | 44 | 1.545 | 41 | |
| 3 | Wycombe Wanderers | 30 | 18 | 4 | 8 | 93 | 50 | 1.860 | 40 | |
| 4 | Oxford City | 30 | 17 | 4 | 9 | 87 | 58 | 1.500 | 38 | |
| 5 | Walthamstow Avenue | 30 | 16 | 5 | 9 | 59 | 40 | 1.475 | 37 | |
| 6 | Tooting & Mitcham United | 30 | 15 | 4 | 11 | 84 | 55 | 1.527 | 34 | |
| 7 | Barking | 30 | 14 | 2 | 14 | 59 | 53 | 1.113 | 30 | |
| 8 | Woking | 30 | 12 | 6 | 12 | 66 | 66 | 1.000 | 30 | |
| 9 | Bromley | 30 | 11 | 7 | 12 | 56 | 55 | 1.018 | 29 | |
| 10 | Clapton | 30 | 10 | 6 | 14 | 55 | 67 | 0.821 | 26 | |
| 11 | Ilford | 30 | 10 | 6 | 14 | 46 | 67 | 0.687 | 26 | |
| 12 | Kingstonian | 30 | 9 | 4 | 17 | 54 | 72 | 0.750 | 22 | |
| 13 | St Albans City | 30 | 8 | 6 | 16 | 53 | 89 | 0.596 | 22 | |
| 14 | Leytonstone | 30 | 7 | 6 | 17 | 40 | 87 | 0.460 | 20 | |
| 15 | Romford | 30 | 7 | 5 | 18 | 54 | 76 | 0.711 | 19 | Switched to theSFL Division One |
| 16 | Corinthian-Casuals | 30 | 7 | 5 | 18 | 44 | 92 | 0.478 | 19 |