Miss Grand Thailand 2015 was the 3rd edition of the pageant. Pre-pageant activities took place in Chumphon Province, and the final was held on 2015-05-12 at Indoor Stadium Huamark, Bangkok, broadcast live by Channel 7. Miss Grand Thailand 2014, Porrapassorn Worarinda, crowned Rattikorn Kunsom of Songkhla as the winner. She later represented Thailand at Miss Grand International 2015, staged at the same venue.