Chonlachat Sangiam is 24 years old and 173 cm tall in height. She is contestant number 18 in Miss World Thailand 2018. Chonlachat is currently studying for a degree in Engineering in the University of the Thai-Nichi Institute of Technology.
Chonlachat has had prior experience in the pageant world as she was in the top 40 in Miss Universe Thailand 2014 and in the top 10 in Miss Thailand World 2015. She is trained in Taekwondo, dancing, horse riding and buffalo riding.