Ngua Nam Thum (Thai: งั่วนำถุม) was a king of Sukhothai, an ancient kingdom in Thailand. He was from the House of Phra Ruang.
Preceded by Loe Thai, he possibly ascended the throne of Sukhothai in 1866 BE (1323/24 CE). He reigned until his death, which possibly took place in 1890 BE (1347/48 CE). Upon his death, he was succeeded by Mahathammaracha I (Lue Thai).