Sadong-guyŏk, or Sadong District, is one of the 19 guyŏk, and one of the six, that constitute East Pyongyang, North Korea. It is on the eastern bank of the Taedong River, and the mouth of the Nam River. It is north of Ryŏkp'o-guyŏk (Ryokpho District), east of Taedonggang-guyŏk (Taedonggang District) and north east of Tongdaewon-guyŏk. It was established in September 1959.

Coordinates: 39°01′09″N 125°52′37″E / 39.01925°N 125.877057°E / 39.01925; 125.877057