As of America250’s 2026 anniversary year, Rosie Rios chairs the United States Semiquincentennial Commission.
Rios became chair in July 2022. She is a former Treasurer of the United States, a position she held during the Obama administration. As chair, she leads the congressionally appointed commission responsible for promoting and coordinating the national semiquincentennial observance.
The chairmanship is distinct from the executive leadership of America250.org, Inc., the nonprofit supporting organization. That arrangement allows the public-private partnership to combine a federal commission with a separate operational and fundraising structure.
Several names can appear in earlier America250 materials because the commission has had different chairs during its planning period. Daniel M. DiLella, for example, was an earlier chairman. Rios’s role connects the 2026 anniversary to a senior former Treasury official while preserving the commission’s bipartisan and civic focus.