Charles Pomeroy Otis (April 8, 1840 – November 17, 1888) was an American educator and author.
After graduation in 1861 he was for nearly a year principal of an academy in Fairfield, Connecticut, and then became a teacher in General Russell's school in New Haven, where he remained until he entered on a tutorship (in Latin) in the college, in January, 1865.
July, 1869, he resigned this office, and he spent the next three years in Europe, chiefly in study in Paris and Berlin.
In the same summer he was appointed to the Professorship of Modern Languages in the Massachusetts Institute of Technology, which he occupied until his death.
Professor Otis was married, June 11, 1884, to Sarah Margaret Noyes, of Boston, who survived him with two sons.