Harriet Isabel Ballintine (December 23, 1864 – February 9, 1951) was the athletic director at Vassar College from 1891 to 1930 and was a leader in the development of physical education for women.

Harriet Isabel Ballintine was born December 23, 1864, in Le Roy, New York,[1] a small town in Genesee County.

After studying in Europe, and graduating from the Sargent School of Physical Training in Cambridge, Massachusetts, she returned briefly to Ingham as a teacher.

In 1891, she moved on to Vassar College where she was first appointed Director of the Gymnasium, and was later named assistant professor.

[4] It was there in 1901 that she met Constance Applebee and invited the Englishwoman to demonstrate field hockey at Vassar.