Henry Flagg French (August 14, 1813 – November 29, 1885) was an American agriculturalist, inventor, lawyer, judge, postmaster, writer, assistant secretary of the treasury, and the first president of the Massachusetts Agricultural College (now the University of Massachusetts Amherst).
He was also a prominent figure in many agricultural societies, a vice president of the United States Agricultural Society, and a patent holder.
He is perhaps best known for his development and popularization of the French drain, as well as being the father of renowned sculptor Daniel Chester French, who created the iconic statue of Abraham Lincoln central to the Lincoln Memorial.