Miss Universe Thailand 2020 was the 21st edition of the Miss Universe Thailand pageant, held on 10 October 2020 at the True Icon Hall of Iconsiam.

[1] Amanda Obdam was crowned by the previous winner Paweensuda Drouin.

[2] Obdam represented Thailand at Miss Universe 2020 and finished as a top 10 semifinalist.

§ – Voted into the Top 10 by viewers online.

29 contestants competed for the title of Miss Universe Thailand 2020.