Mary Ellen Hinamon Withrow (born October 2, 1930) is an American activist and former politician who served as the 40th Treasurer of the United States from March 1, 1994 to January 20, 2001 under President Bill Clinton.

[1] Withrow began her career in public service in 1969 as the first woman elected to the Elgin Local School Board in Marion County.

As Ohio's Treasurer, Withrow instituted new programs, achieved record earnings, and was nationally recognized for her efficient management.

Withrow is the recipient of numerous honors, including the Donald L. Scantlebury Memorial Award from the Treasury's Joint Financial Management Improvement Program for financial excellence and improvement in government, and the nation's "Most Valuable State Public Official" by City & State Newspaper in 1990.

She is also quoted extensively in newspaper advertisements and direct mailings of by Federated Mint LLC and Lincoln Treasury.