Dave Hennen Morris (April 24, 1872 – May 4, 1944) was an American lawyer, diplomat, and Thoroughbred racehorse owner who co-founded the International Auxiliary Language Association (IALA).

[1] Following his father's death in 1895, Dave Morris inherited considerable wealth and held business interests in railroads, hotels, and other enterprises.

From 1933 to 1937, he was appointed the United States Ambassador to Belgium and Envoy Extraordinary and Minister Plenipotentiary to Luxembourg by his friend, Franklin D.

[7] His father was a prominent figure in Thoroughbred horse racing who owned Morris Park Racetrack in The Bronx, New York.

Dave Morris and brother Alfred, a vice-chairman and steward of the Jockey Club, owned, bred, and raced a number of successful Thoroughbreds.