Pornchai (, ) is a Thai masculine given name. Notable people with the name include:
Pornchai Ardjinda (born 1984), footballer Pornchai Kaokaew (born 1981), sepak takraw player Pornchai Mongkhonvanit (born 1958), president of the Siam University in Bangkok Pornchai Saosri (1989 – 2015), unconfirmed world record claimant of tallest human of all time Pornchai Thongburan (born 1974), boxer Pornchai Wongsriudomporn, one of the producers of Inhuman Kiss