Died of heart failure in Rose Valley, Pennsylvania, at age 99.
Mildred Scott Olmsted passed away on July 2, 1990, at her home in Rose Valley, Pennsylvania. She was 99 years old, just months shy of her centennial birthday. Her death marked the end of a remarkable life defined by relentless dedication to social and political reform. Olmsted's legacy as a pioneering activist in the women's rights and peace movements was widely recognized, and she remains a guiding figure for activism both within the United States and globally. Her contributions continue to inspire efforts toward social justice and peace across various spheres of activism.