Clementine Tangeman (17 February 1905 - 17 January 1996) was an American philanthropist, who inherited a fortune from her family's business, the Cummins Engine Company.

When the US entered the war, she worked with the Columbus Red Cross, recruiting members for a chapter of Gray Ladies, volunteers who would provide non-medical care to patients.

She served in North Africa, Sicily and Italy, including Anzio beachhead, and in hospitals in Naples, Rome and Florence.

[7] On the subject of volunteering, Tangeman said, "Find a cause that challenges your imagination and kindles your enthusiasm, and then give it your best thought and effort and stick with it.

"[8] Tangeman served on many boards of directors and other governance committees, including: In 1971, together with her brother and his wife, she donated US$2,000,000 to the development of the public part of The Commons, a mall in Bartholomew County, Indiana.

[14] Tangeman was instrumental in raising funds to build Nuestra Cabaña, WAGGGS' third World Centre in Cuernavaca, Mexico.

[17] Tangeman was president of the Irvin-Sweeney-Miller Foundation where she led activities and awarded grants “in a search for solutions to problems faced by youths and the disadvantaged in Bartholemew County.”[7] In 1974 Tangeman, together with her brother and the Irwin-Sweeney-Miller Foundation, helped to establish the Institute of Sacred Music at Yale University with a grant of US$10,000.

In a letter accompanying the grant they wrote: "Out of what context does our interest in an Institute of Worship, Music and the Related Arts arise?