The 1903 season was the 20th season of regional competitive soccer 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.)