Miss Thailand World is an annual national beauty pageant held in Thailand to select representatives for the Miss World pageant. The reigning Miss Thailand World is Nonthawan Thongleng who was crowned on June 21’2014 in Bangkok by Kanyapak Phoksomboon, Miss Thailand World 2013. Nonthawan represented Thailand at the Miss World 2014 pageant and placed Top 11 and also won the special award for The People's Choice Award.

BEC-Tero Entertainment Pcl earned the rights to broadcast Miss Thailand World pageant in the year 1985. The first Miss Thailand World was Parnlekha Wanmuang who was crowned in the year 1985. Thailand has had a decent performance at the Miss World pageant so far. Prathumrat Woramali, as Miss Thailand World 1989, was Thailand's representative at Miss World 1989 in Hong Kong. She won the Queen of Asia Award, and later became the 3rd runner-up Miss World 1989.

Methinee Kingpayhom, Miss Thailand World 1992 won Queen of Asia in Miss World 1992. Patinya Thongsri, Miss Thailand World 1994 was announced as Thailand’s first ever Miss Personality in Miss World 1994. Tanya Tiana Suesuntisook, Miss Thailand World 1997 won Miss Personality and was ranked as the 4th runner-up Miss World 1997. Lada Engchawadechasilp Miss Thailand World 2001 was awarded Miss Photogenic Award. The Miss Thailand World 2015 pageant is scheduled to be held on August 15’ 2015 and the winner will represent at the Miss World 2015 pageant.