Charles Edward Hammett Sr. (January 29, 1865 – October 2, 1945) was an American football and basketball coach and college athletics administrator. He served as the head football coach at Northwestern University from 1910 to 1912 and at Allegheny College from 1913 to 1917 and in 1919, compiling a career college football record of 35–19–6. Hammett was also the head basketball coach at Northwestern (1911–1912) and Allegheny (1913–1918, 1919–1920, 1921–1922), tallying a career college basketball mark of 60–41. In addition, he served as Northwestern's athletic director from 1910 to 1913.