Glynn Robert Donaho (March 25, 1905 – May 26, 1986), nicknamed "Donc", was a United States Navy officer known principally for his exploits as a submarine commander during World War II, for which he received the Navy Cross four times, the Silver Star twice, and the Bronze Star Medal.

After the war, Donaho testified as a witness at the court martial of Captain Charles Butler McVay III, commander of the USS Indianapolis (CA-35).

Donaho was the Director of the Recruiting Division in the Bureau of Naval Personnel in Washington, D.C., from October 1945 to May 1948, followed by service as the Commander of Submarine Squadron 3 from May 1948 to June 1950.

His final assignment was as Commander of the Military Sea Transportation Service from July 1964 until his retirement from the Navy on April 1, 1967.

After his retirement from navy, Donaho lived in Washington D.C. and McLean, Virginia until 1978, before moving to Sierra Vista, Arizona.

In accordance to his wishes, he was cremated and his ashes were scattered over the Pacific Ocean from the fantail of a United States Navy submarine.