2023 AFF U-23 Championship

The 2023 AFF U-23 Championship was the 4th edition of the AFF U-23 Championship, organised by the ASEAN Football Federation (AFF). The tournament took place from 17 to 26 August in Rayong, Thailand. Vietnam are the defending champions, having won the 2022 edition and successfully defended their title through a 6–5 victory on penalties following a 0–0 draw after extra time over Indonesia in the final, thus becoming the first team to win the tournament for a second time.

Qualified teams
There was no qualification phase. Singapore withdrew due to the country's under-23 team being subject to evaluation following the 2023 SEA Games. The following teams, all from member associations of the AFF, entered the tournament:

Draw
The draw for the 2023 AFF U-23 Championship was held on 29 May 2023 in Bangkok, Thailand and was streamed online in the competition's official YouTube channel. The seeding was based on the performance from the previous tournaments.

Squads
A final squad of 23 players (three of whom must be goalkeepers) must be registered one day before the first match of the tournament.

Match officials

 * Abdul Hakim Mohd Haidi
 * Ngô Duy Lân
 * 🇱🇦 Souei Vongkham
 * Muhammad Usaid Jamal
 * 🇰🇷 Choi Hyun-jai
 * 🇹🇭 Songkran Bunmeekiart
 * 🇹🇭 Torpong Somsing
 * 🇯🇵 Hiroki Kasahara

Group stage
All times are local, ICT (UTC+7).

Ranking of second-placed teams
Only one second-placed team will qualify for the semi-finals.

Result against fourth-placed team in Group A will be not considered for this ranking.

Knockout stage
In the knockout stage, the penalty shoot-out was used to decide the winner if necessary.

Final ranking
This table will show the ranking of teams throughout the tournament.