List of AFL debuts in 2003
This is a listing of Australian rules footballers who made their senior debut for an Australian Football League club in 2003.
Debuts
| Name | Club | Age at debut | Round debuted | Games | Goals | Notes |
| 148 | 6 | |||||
| 77 | 18 | Previously played for Richmond | ||||
| 71 | 94 | |||||
| 28 | 56 | Previously played for North Melbourne. | ||||
| 25 | 3 | Previously played for St Kilda. | ||||
| 20 | 23 | Previously played for Geelong. | ||||
| 7 | 4 | |||||
| 119 | 75 | |||||
| 34 | 33 | Previously played for Essendon. | ||||
| 4 | 1 | |||||
| 2 | 0 | |||||
| 132 | 153 | |||||
| 133 | 79 | |||||
| 99 | 127 | |||||
| 71 | 20 | Previously played for Port Adelaide. | ||||
| 27 | 5 | |||||
| 26 | 5 | |||||
| 13 | 0 | Previously played for North Melbourne. Son of Bryan Martyn. | ||||
| 4 | 6 | Grandson of Andy Angwin. | ||||
| 151 | 101 | |||||
| 62 | 31 | Previously played for Melbourne. 2000 Brownlow Medallist. | ||||
| 46 | 20 | |||||
| 46 | 20 | Previously played for West Coast. | ||||
| 28 | 8 | |||||
| 142 | 83 | Previously played for Fremantle. | ||||
| 115 | 44 | Son of Tim Watson. Captain of Essendon. | ||||
| 94 | 40 | |||||
| 40 | 50 | Previously played for Brisbane. | ||||
| 21 | 11 | Previously played for Richmond. | ||||
| 2 | 0 | |||||
| 156 | 60 | |||||
| 127 | 38 | |||||
| 114 | 125 | Previously played for Brisbane. | ||||
| 33 | 11 | |||||
| 52 | 29 | |||||
| 23 | 6 | |||||
| 22 | 24 | |||||
| 102 | 38 | |||||
| 72 | 67 | Previously played for St Kilda. | ||||
| 23 | 1 | |||||
| 2 | 1 | Previously played for Fremantle and the Western Bulldogs. | ||||
| 108 | 4 | Rising Star Award 2004. | ||||
| 95 | 40 | |||||
| 71 | 1 | Brother of Trent Carroll. | ||||
| 47 | 6 | |||||
| 47 | 10 | Previously played for Essendon. | ||||
| 149 | 85 | |||||
| 149 | 25 | |||||
| 129 | 119 | |||||
| 118 | 64 | Previously played for Fremantle. | ||||
| 44 | 16 | Brother of Anthony Stevens. Previously played for Port Adelaide. | ||||
| 8 | 6 | 2005 Magarey Medallist. Brother of Shane Clayton. | ||||
| 7 | 1 | |||||
| 1 | 1 | Son of Francis Bourke and grandson of Frank Bourke. Previously played for Richmond. | ||||
| 110 | 55 | |||||
| 109 | 50 | |||||
| 55 | 80 | 2004 Norm Smith Medallist. Previously played for North Melbourne. | ||||
| 54 | 6 | Previously played for North Melbourne. | ||||
| 2 | 0 | |||||
| 116 | 32 | Previously played for Adelaide. | ||||
| 71 | 58 | |||||
| 34 | 10 | |||||
| 19 | 5 | Previously played for Essendon. | ||||
| 10 | 2 | Previously played for Hawthorn. | ||||
| 4 | 6 | Cousin of Ashley, Toby and Cory McGrath | ||||
| 162 | 79 | |||||
| 142 | 58 | Son of Ray Ball and brother of Matthew Ball. | ||||
| 68 | 30 | Previously played for Western Bulldogs and Melbourne. | ||||
| 55 | 5 | |||||
| 45 | 2 | Previously played for the Western Bulldogs. | ||||
| 15 | 13 | Previously played for Port Adelaide. Brother of Derek Murray. | ||||
| 12 | 0 | |||||
| 10 | 3 | |||||
| 170 | 15 | Previously played for Brisbane. | ||||
| 133 | 14 | |||||
| 98 | 99 | |||||
| 97 | 150 | Son of Craig Davis. Previously played for Collingwood. | ||||
| 8 | 0 | |||||
| 6 | 0 | |||||
| 133 | 38 | Brother of Troy, Joel and Scott Selwood. | ||||
| 110 | 84 | |||||
| 103 | 51 | Previously played for Hawthorn. | ||||
| 32 | 24 | Previously played for Collingwood. | ||||
| 1 | 0 | |||||
| 163 | 57 | |||||
| 45 | 19 | |||||
| 15 | 1 | Previously played for Port Adelaide. | ||||
| 2 | 0 |