The Thailand national under-20 football team (, ) is the national team for the under-20 and 19 level, representing Thailand in international football competitions in the FIFA U-20 World Cup, AFC U-20 Asian Cup and AFF U-19 Youth Championship. It is controlled by the Football Association of Thailand.
Thailand is a two-time AFC champions and four-time AFF champions. Thailand has never managed to qualify for the FIFA U-20 World Cup, but the under-17 national team has done so.
The following 23 players for the 2025 AFC U-20 Asian Cup.
The following players have also been called up in the last 12 months to the Thailand squad.
<sup>INJ</sup> Withdrew from the squad due to injury<br> <sup>PRE</sup> Included in the Preliminary squad or on standby<br> <sup>RET</sup> Retired from the national team<br> <sup>SUS</sup> Serving suspension from the national team<br> <sup>WD</sup> Withdrew from the squad due to non-injury issue<br>
This is a list of honours for the Thailand national under-20 football team.