Harry A. Slattery (June 13, 1887 – September 1, 1949), was an American lawyer and politician. He was United States Under Secretary of the Interior from 1938 to 1939 and gave his name to the Slattery Report, which proposed to develop Alaska through immigration. The proposal, which included the settlement of Jewish refugees from Germany and Austria, largely in response to Nazi antisemitism, was never implemented.