Henry Arthur Van Alstyne (October 9, 1869 – January 23, 1947) was an American civil engineer and politician from New York.
He was educated at Nassau Academy, Marshall Seminary Preparatory School and graduated C.E.
In 1897, he became Engineer and Superintendent for the Furnaceville Iron Company, at Rochester, New York.
In 1898, he resigned this position to accept one with the Union Bridge Company, at Athens, Pennsylvania.
Bond in May 1904, Governor Benjamin B. Odell appointed him New York State Engineer and Surveyor.