This is about the American naval officer. For others, see Donald Duncan (disambiguation).

Donald Bradley Duncan (1896–1975) was an admiral in the United States Navy, who played an important role in aircraft-carrier operations during World War II.

Donald B. Duncan
Nickname(s)	"Woo"
Born	(1896-09-01)September 1, 1896 Alpena, Michigan, US
Died	September 8, 1975(1975-09-08) (aged 79) Pensacola, Florida, US
Service/branch	United States Navy
Years of service	1917–1956
Rank	Admiral
Commands held	2nd Task Fleet USS Long Island USS Essex
Battles/wars	World War II
Awards	Legion of Merit

Duncan graduated from the United States Naval Academy in 1917, and was assigned to the USS Oklahoma (BB-37). He received a master's degree in radio engineering from Harvard University in 1925.

In 1941, he was the first commander of the USS Long Island, the Navy's first escort aircraft carrier.

As the air operations officer to Admiral Ernest J. King, Duncan assisted with the planning for the Doolittle Raid, and was the one who proposed the use of both the B-25 Mitchell bombers and the Hornet (CV-8) for the raid. He was then appointed to be the first commanding officer of the carrier Essex (CV-9).

Duncan held several important staff and operational positions following the war. He served as Deputy Chief of Naval Operations (Air) from March 6, 1947, to January 20, 1948. He commanded the 2nd Task Fleet after 1948, and was the Vice Chief of Naval Operations from 1951 to 1956.

Following his retirement from the navy on March 1, 1957, he served as Governor of the Naval Home until May 1962. He died on September 8, 1975.