Aaron Stanton Merrill (March 26, 1890 – February 28, 1961), also known as Tip Merrill, was an American rear admiral during World War II who led American naval forces during the Solomon Islands campaign as well as the first admiral to solely use radar for fire control during wartime.

In 1938–39 Merrill completed the senior course at the Naval War College, Newport, Rhode Island, and was promoted to captain.

Merrill was Professor of Naval Science and Tactics at Tulane University, until being assigned command of the battleship Indiana (BB-58) in April 1942.

In March 1943, during the Solomon Islands campaign, he showed the usefulness of radar against enemy naval forces at the Battle of Blackett Strait.

Serving as Director of Office of Public Relations for the Navy Department from June 15, 1944, until April 23, 1945, Merrill joined a diplomatic delegation to meet with members of the Chilean government to discuss mutual defense policies in Santiago, Chile.