Lam Nam Yang (Thai: ลำน้ำยัง, pronounced [lām náːm jāŋ]; Northeastern Thai: ลำน้ำยัง, pronounced [la᷇m nâːm ɲa᷇ŋ]) is a watercourse of Thailand. It is a tributary of the Chi River.

15°48′N 104°00′E / 15.800°N 104.000°E / 15.800; 104.000