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

[6] Rayong representatives have yet to win the Miss Grand Thailand title.

The highest placement they obtained in the contest was in the top 10 finalists, achieved in 2019 by Kanyalak Nookaew.

[12] The following table details Miss Grand Rayong's annual editions since 2016.

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