Who was the first female Supreme Court justice in the United States?

The first female Supreme Court justice in the United States was Sandra Day O'Connor. Appointed by President Ronald Reagan in 1981, O'Connor's appointment marked a significant milestone in U.S. history as she broke the gender barrier in the nation's highest court. Her tenure lasted until her retirement in 2006, during which she was known for her pragmatic approach to the law and often played a pivotal role in deciding crucial cases, particularly in matters related to women's rights, affirmative action, and the death penalty. O'Connor's influence extended beyond her judicial decisions as she became a symbol of progress for women in government and the legal profession.