1909–10 Western Football League
| Season | 1909–10 |
|---|---|
| Champions | Treharris |
← 1908–09 1910–11 → | |
The 1909–10 season was the 18th in the history of the Western Football League.
After Division One was scrapped at the end of the previous season, the members clubs all having resigned to concentrate on the Southern League, the Western League became a single-division league for the first time since the inaugural 1892–93 season. The champions were Treharris, the first time that the title had been won by a Welsh team, although they left the league at the end of the season.