Daniel Oren Hastings (March 5, 1874 – May 9, 1966) was an American lawyer and politician from Wilmington, New Castle County, Delaware.

Senator T. Coleman du Pont, December 10, 1928 and served the remainder of his term.

Hastings lost his bid for a second full term in 1936 to Democrat James H. Hughes, a lawyer from Dover, Delaware.

In all he served from December 10, 1928, to January 2, 1937, during the administrations of U.S. Presidents Herbert Hoover and Franklin D. Roosevelt.

Hastings died at Wilmington and is buried in the Lower Brandywine Cemetery, near Centerville, Delaware.