USPS issued a Mary Lyon stamp in July 1993, honoring her leadership in women's education.
In July 1993, the United States Postal Service released a commemorative stamp featuring Mary Lyon as part of its "Women on Stamps" series. This honor recognized Lyon's transformative impact on women's education and her foundational role in establishing institutions like Mount Holyoke College. The stamp served as a lasting tribute, immortalizing her contributions and ensuring that future generations acknowledge her pioneering efforts in advancing the cause of women's education.