Benham's estate left $15 million to Bryn Mawr College in 2015.
On March 1, 2015, Bryn Mawr College announced the receipt of a significant $15 million bequest from the estate of Isabel Benham. This generous gift was allocated to support science and international study programs, reflecting her lifelong commitment to education and empowerment of women. The bequest highlighted her enduring legacy and her belief in the transformative power of education as a tool for breaking gender barriers and promoting women's roles in traditionally dominated male sectors. This act of philanthropy ensured the continuation of opportunities for future generations of women to excel in academics and beyond.