Miss Thailand (; ), is a beauty pageant held in Thailand for Thai women first held in 1934 under the name of Miss Siam (; ). Since 2025, The winner of Miss Thailand pageant represents Thailand at Miss Cosmo.
The reigning Miss Thailand 2025 is Chotnapa Kaewjarun from Phra Nakhon Si Ayutthaya.
The inaugural Miss Siam pageant took place on December 10, 1934, in Phra Nakhon District of Bangkok. On hiatus during World War II, it resumed in 1948 as the Miss Thailand pageant.
The winner of Miss Thailand used to represent the country at Miss Universe, while 1st Runner-up presented at Miss Asia Pacific International. However, Miss Thailand Organization lost these licenses to Miss Thailand Universe in 2000. The last Miss Thailand to represent her country at Miss Universe 1999 is Apisamai Srirangsan, Miss Thailand 1999.
In 2019, Sireethorn Leearamwat, Miss Thailand 2019, represented the country at Miss International 2019 and won the title for the first time for Thailand.
The beauty pageant was broadcast on BBTV (channel 7) until 2000, then moved to ITV, which later was transformed into TITV (Thailand Independent Television) and TPBS (Thailand Public Broadcasting Service) until 2007.
In 2008âÂÂ2014, Miss Thailand pageant was broadcast on MCOT.
In 2016 and 2020âÂÂpresent, Miss Thailand pageant was returned to broadcast on BBTV (channel 7).
In 2019, Miss Thailand pageant was returned to broadcast on MCOT.
Winners of Big Four international beauty pageants:
Winners of other international beauty pageants:
Note that the year designates the time Miss Thailand has acquired that particular pageant franchise.
The following are the Miss Thailand titleholders throughout the years.