The 1903 season was the 20th season of regional competitive association football in Australia.
| Federation | Competition[1] | Grand Final | Regular Season | |||||
|---|---|---|---|---|---|---|---|---|
| Champions | Score | Runners-up | Premiers | Runners-up | Third place | |||
| Northern District British Football Association | Northern NSW Football League[2] | Wallsend Royals | 3–1 | Adamstown Rosebud | Wallsend Royals | Adamstown Rosebud | Merewether Advance | |
| South British Football Soccer Association | New South Wales British Football Association[3] | Pyrmont | 4–2 | Glebe | Pyrmont | Balmain | Rozelle | |
| Queensland British Football Association | Brisbane Area League[4] | Dinmore Bush Rats | Unknown | Dinmore Bush Rats | – | — | ||
| South Australian British Football Association | South Australia Division One[5] | Not played | North Adelaide | South Adelaide | Woodville | |||
| Western Australian Soccer Football Association | Western Australia Division One[6] | Not played | Perth FC | Civil Service | Corinthian | |||
| Federation | Competition[7] | Winners | Runners-up | Venue | Result | |
|---|---|---|---|---|---|---|
| Northern District British Football Association | Ellis Cup[8] | Adamstown Rosebud | Merewether Advance | – | Forfeit | |
| South British Football Soccer Association | Gardiner Challenge Cup[9] | Pyrmont District (1/0) | Glebe (0/1) | – | 4–2 |
(Note: figures in parentheses display the club's competition record as winners/runners-up.)