Serbian Democratic Party or Serb Democratic Party (Serbian: Српска демократска Странка, СДС or Srpska Demokratska Stranka, SDS) may refer to:
- Serb Democratic Party (Bosnia and Herzegovina), major Serb nationalist party established in 1990 and based in Banja Luka, active in Republika Srpska and Bosnia and Herzegovina
- Serb Democratic Party (Croatia), defunct Serb nationalist party in Croatia, established in 1990 and dissolved in 1995, formerly based in Knin
- Serb Democratic Party (Serbia, 2011), minor Serb nationalist party established in 2011 and based in Novi Sad