Miss Grand Suphan Buri (Thai: มิสแกรนด์สุพรรณบุรี) is a Thai provincial beauty pageant which selects a representative from Suphan Buri province to the Miss Grand Thailand national competition.

[4] Suphan Buri representatives have yet to win the Miss Grand Thailand title.

The highest and only placement they obtained in the contest was in the top 20 finalists, achieved in 2022 by Thansita Dilhokanansakul.

The license for Suphan Buri province was granted to a local entrepreneur Napasanan Kamolsitthiphan, who organized the first Miss Grand Kanchanaburi contest in May 2016 and named Parityaphat Khonthong the winner.

The following is a list of Suphan Buri representatives who competed at the Miss Grand Thailand pageant.