Charles Haynes Haswell (May 22, 1809 – May 12, 1907) was a naval engineer, New York City politician and historian. A native resident of New York City, Haswell was author of one of the most broadly circulated engineering manuals of the 19th century, and also published a collection of remembrances of the city drawn from his private journals. He was the first Engineer-in-Chief of the United States Navy.