Social Democratic Party (Estonia)

Social Democratic Party
Sotsiaaldemokraatlik Erakond
LeaderLauri Läänemets
FounderMarju Lauristin
Founded8 September 1990 (1990-09-08)
HeadquartersToompuiestee 16, Tallinn 10137
Youth wingYoung Social Democrats
Membership (2021) 5,337
IdeologySocial democracy
Pro-Europeanism
Political positionCentre-left
European affiliationParty of European Socialists
European Parliament groupProgressive Alliance of Socialists and Democrats
International affiliationSocialist International (1990–2017)
Colours  Red
Riigikogu
9 / 101
Municipalities
48 / 1,717
European Parliament
2 / 7
Party flag
Website
sotsid.ee

The Social Democratic Party (Estonian: Sotsiaaldemokraatlik Erakond, SDE) is a centre-left political party in Estonia. It is currently led by Lauri Läänemets. The party was formerly known as the Moderate People's Party (Estonian: Rahvaerakond Mõõdukad). The SDE has been a member of the Party of European Socialists since 16 May 2003 and was a member of the Socialist International from November 1990 to 2017. It is orientated towards the principles of social-democracy, and it supports Estonia's membership in the European Union. From April 2023 until March 2025, the party was a junior coalition partner in the third Kallas government and the Michal government.