The Social Democratic Party () is a South Korean political party that was registered on 15 February 2024. It was founded by members who left the Justice Party.
The party participated in the 2024 South Korean legislative election as part of the BIP-led New Progressive Alliance, which in turn participated as part of the DPK-led Democratic Alliance of Korea. Han Chang-min, a representative of the SDP, was elected to the National Assembly by proportional representation.