The Democratic Union Party is a Kurdish left-wing political party established on 20 September 2003 in northern Syria. It is a founding member of the National Coordination Body for Democratic Change. It is the leading political party among Syrian Kurds. The PYD was established as a Syrian branch of the Kurdistan Workers Party (PKK) in 2003, and both organizations are still closely affiliated through the Kurdistan Communities Union (KCK).

The Kurdish population of Syria is the country's largest ethnic minority, usually estimated at around 10% of the Syrian population and 5% of the Kurdish population.