Sudong District is a district in South Hamgyŏng province, North Korea. It was formed from part of Kowŏn County in December 1990.
Sudong is the site of a major coal seam first discovered in 1918. The P'yŏngra Line of the Korean State Railway passes through the district.
Sudong is divided into 6 tong (neighbourhoods) and 14 ri (villages):