Nam Ngim (Thai: น้ำงิม, pronounced [náːm ŋīm]) is a watercourse in Thailand. Its source is located in the Phi Pan Nam Range. It is a tributary of the Yom River, which is part of the Chao Phraya River basin.

Coordinates: 19°16′N 100°22′E / 19.267°N 100.367°E / 19.267; 100.367