The1909–10 season was the fifth in the history of theIsthmian League, an Englishfootball competition.
Bromley were champions for a second time in a row.
| Season | 1909–10 |
|---|---|
| Champions | Bromley |
| Matches | 90 |
| Goals | 336 (3.73 per match) |
1910–11 → | |
| Pos | Team | Pld | W | D | L | GF | GA | GR | Pts |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Bromley | 18 | 11 | 4 | 3 | 32 | 10 | 3.200 | 26 |
| 2 | Clapton | 18 | 10 | 4 | 4 | 56 | 19 | 2.947 | 24 |
| 3 | Nunhead | 18 | 10 | 4 | 4 | 49 | 26 | 1.885 | 24 |
| 4 | Ilford | 18 | 10 | 3 | 5 | 31 | 17 | 1.824 | 23 |
| 5 | Dulwich Hamlet | 18 | 8 | 4 | 6 | 26 | 26 | 1.000 | 20 |
| 6 | Leytonstone | 18 | 7 | 3 | 8 | 44 | 46 | 0.957 | 17 |
| 7 | Oxford City | 18 | 5 | 4 | 9 | 28 | 45 | 0.622 | 14 |
| 8 | London Caledonians | 18 | 5 | 3 | 10 | 19 | 40 | 0.475 | 13 |
| 9 | West Norwood | 18 | 5 | 2 | 11 | 28 | 52 | 0.538 | 12 |
| 10 | Shepherd's Bush | 18 | 2 | 3 | 13 | 23 | 55 | 0.418 | 7 |