Barbara Madsen (born 1952) is an American jurist and a current Associate Justice of the Washington Supreme Court. She joined the court in 1993 as the first woman to be popularly elected to the Court in Washington state history. She was re-elected in 1998, 2004, and 2010, and 2016. In her years on the Washington Supreme Court, Madsen has sat in judgement on thousands of cases. In October 2018, Madsen concurred when the majority invalidated the state's death penalty. The court found its imposition to be racially biased and therefore in violation of the Constitution of Washington.