Frank Ayres, Jr. (/ɛərz/; 10 December 1901, Rock Hall, Maryland – June 1994) was a mathematics professor, best known as an author for the popular Schaum's Outlines.
Ayres earned his Bachelor of Science degree from Washington College, Maryland and his master's and doctoral degrees from the University of Chicago.
In 1943 he was named the Susan Powers Hoffman Professor of Mathematics.
From 1938 until his retirement in June, 1958, he served as chairman of the mathematics department.
Ayres was also an instructor in the Army Air Corps program at the college, 1943–44, and authored Basic Mathematics of Aviation, which was adopted across the Air Corps training system.