Eliza Kellas (October 4, 1864 – April 10, 1943) was an American educator most known as former principal of Emma Willard School and co-founder of Russell Sage College.
In February 1911, Kellas took the position of headmistress at Emma Willard School in Troy, New York, at the recommendation of Agnes Irwin, the recently retired Dean of Radcliffe College.
The expansion was named Russell Sage College of Practical Arts, and was devoted to vocational training for young women.
The year following Russell Sage's founding, Kellas secured a separate charter for the school from the New York State Board of Regents and they granted their first degrees in 1920.
Kellas retired as Dean and President of Russell Sage College in 1928 and devoted her services entirely to Emma Willard School.