John Thomas Keady (August 18, 1882 – February 12, 1964) was an American football, basketball, and baseball player and coach. He served as the head football coach at Lehigh University from 1912 to 1920, at the University of Vermont from 1921 to 1924, at Marine Corps Base Quantico from 1925 to 1930, and at Western Reserve University from 1931 to 1933, compiling a career college football record of 87–48–6. Keady was also the head basketball coach and the head baseball coach at Dartmouth College, Lehigh, Vermont, and Quantico.

Keady was born on August 18, 1882, in Wakefield, Massachusetts.^[1] He attended Dartmouth College, where he lettered in football and baseball.

Keady was the 13th head football coach at Lehigh University) in Bethlehem, Pennsylvania, serving for nine seasons, from 1912 to 1920, and compiling a record at Lehigh was 56–23–3.^[2] This ranks him second among Lehigh head coaches in winning percentage at .701, behind only Pete Lembo (44–14, .759).^[3] Keady was the head football coach at Western Reserve University from 1931 to 1933, compiling a record of 14–9–2 in three seasons.^[4]

Keady died at the age of 82 on February 12, 1964, in Concord, New Hampshire.^[5]