The Social Democratic Party (Esperanto: Socialdemokratia Partio, SDP) is a political party in Bijan, and one of the country's major parties. The Social Democratic Party currently holds 92 of the 245 seats in the Bijani House of Representatives, and is the senior partner in a coalition government consisting of Together for Bijan and the Bijani Greens. Jakovo Ostaras, the leader of the Social Democratic Party, has been Chief Minister of Bijan since 2009.