| Tourney Name: | AFF U-18 Youth Championship |
| Year: | 2003 |
| Country-Flagvar: | 1974 |
| City: | Yangon Ho Chi Minh City |
| Dates: | 7–18 June |
| Num Teams: | 9 |
| Confederations: | 1 |
| Venues: | 2 |
| Cities: | 2 |
| Count: | 1 |
| Matches: | 20 |
| Goals: | 73 |
| Prevseason: | 2002 |
| Nextseason: | 2005 |
The 2003 AFF U-18 Youth Championship was held from 7 to 18 June 2003 and was co-hosted by Myanmar and Vietnam. This was the inaugural edition of the tournament.
| width=175 | Team | width=20 | Pld | width=20 | W | width=20 | D | width=20 | L | width=20 | GF | width=20 | GA | width=20 | GD | width=20 | Pts |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3 | 2 | 1 | 0 | 14 | 3 | +11 | 7 | ||||||||||
| 3 | 2 | 1 | 0 | 6 | 3 | +3 | 7 | ||||||||||
| 3 | 1 | 0 | 2 | 6 | 7 | -1 | 3 | ||||||||||
| 3 | 0 | 0 | 3 | 1 | 14 | -13 | 0 |
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| width=175 | Team | width=20 | Pld | width=20 | W | width=20 | D | width=20 | L | width=20 | GF | width=20 | GA | width=20 | GD | width=20 | Pts |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 4 | 4 | 0 | 0 | 14 | 2 | +12 | 12 | ||||||||||
| 4 | 3 | 0 | 1 | 15 | 3 | +12 | 9 | ||||||||||
| 4 | 2 | 0 | 2 | 3 | 6 | -3 | 6 | ||||||||||
| 4 | 1 | 0 | 3 | 3 | 9 | -6 | 3 | ||||||||||
| 4 | 0 | 0 | 4 | 1 | 16 | -15 | 0 |
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