| Administrator(s) | ICC Africa and ICC East Asia-Pacific |
|---|---|
| Cricket format | 50-over |
| Tournament format(s) | Round-robin, then finals series |
| Host(s) | Namibia |
| Champions |  Papua New Guinea (1st title) |
| Participants | 8 |
| Matches | 20 |
| Most runs |  Malhar Patel (250) |
| Most wickets | William Harry (12) Patrick Ochan (12) |
The 2003 ICC Africa/East Asia-Pacific Under-19 Championship was a cricket tournament held in Namibia from 4–9 October 2003, during the 2003–04 international season. All matches were held in the capital Windhoek.
Papua New Guinea won the tournament by defeating Uganda in the final, with both teams qualifying for the 2004 Under-19 World Cup in Bangladesh. Kenyan batsman Malhar Patel led the competition in runs scored, while Papua New Guinea's William Harry and Uganda's Patrick Ochan took the most wickets.
The tournament was jointly organised by the African Cricket Association (ACA) and ICC East Asia-Pacific (EAP), the first time such an arrangement had occurred. Eight teams (six African and two EAP) participated, divided into two pools for the group stages. Another joint tournament was held in 2005, for the 2006 World Cup, but separate qualifying tournaments have been held since then – the ICC Africa Under-19 Championships and the EAP Under-19 Cricket Trophy.