| Continent: | SEABA U-18 |
| Year: | 2012 |
| Host: | Singapore |
| Dates: | June 26–30 |
| Teams: | 5 |
| Federations: | 10 |
| Venues: | 1 |
| Cities: | 1 |
| Champions: | Philippines |
| Title Number: | 6 |
| Ppg P: | Goh (16.3) |
| Ppg T: | (91.0) |
| Rpg P: | Goh (9.0) |
| Rpg T: | (53.8) |
| Apg P: | Thng J.R. (3.8) |
| Apg T: | (17.5) |
| Prevseason: | 2010 |
| Nextseason: | 2014 |
The 2012 SEABA Under-18 Championship was the qualifying tournament for Southeast Asia Basketball Association at the 2012 FIBA Asia Under-18 Championship. The tournament was held in Singapore from June 26 to June 30. The Philippines successfully defended their title by sweeping all of their assignments to earn right to represent SEABA together with Indonesia and Singapore.
| width=10px bgcolor="#ccffcc" | Qualified for the 2012 FIBA Asia Under-18 Championship |
| width=180 | Team | width=30 | Pld | width=30 | W | width=30 | L | width=30 | PF | width=30 | PA | width=30 | PD |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 4 | 4 | 0 | 364 | 213 | 151 | ||||||||
| 4 | 3 | 1 | 270 | 228 | 42 | ||||||||
| 4 | 2 | 2 | 304 | 204 | 100 | ||||||||
| 4 | 1 | 3 | 311 | 293 | 18 | ||||||||
| 4 | 0 | 4 | 131 | 442 | -311 |
| width=40 | Rank | width=180 | Team |
|---|---|---|---|
| 4 | |||
| 5 |