Sosa District () is a district of the city of Bucheon in Gyeonggi Province, South Korea. 'So' means 'white' and 'sa' means 'sand'. Many years ago, there were many streams in this region which is why it is named so.
The district was abolished originally in July 2016 as Bucheon became a unified city without any administrative districts. However, years later, it was revived as a district by the Bucheon municipal government on January 1, 2024.
Sosa-gu is divided into the following "dong"s.