2019 South Korean by-elections

The 2019 South Korean by-elections was held in South Korea on 3 April 2019. 2 seats to the National Assembly of South Korea were contested.

Reasons for by-elections
The following Members of National Assembly lost or resigned from their seats:
 * South Gyeongsang Changwon Seongsan District: Roh Hoe-chan (Justice), due to Roh's death.
 * South Gyeongsang Tongyeong-Goseong District: Lee Gun-hyeon (Liberty Korea), due to Lee's violation of the Political Funds Act.