Levin Mynn Powell (April 8, 1798 – January 15, 1885) was a rear admiral of the United States Navy.

He was promoted to lieutenant on April 28, 1826, following service in the Gulf of Mexico and West Indies fight pirates.

[3] He then served in the sloop USS Natchez in Charleston, South Carolina, and then moved back to Europe and was stationed off the French coast.

From 1848 to 1849, he was Assistant Inspector of Ordnance in Washington, D.C.[3] In July 1849, Powell commanded the sloop-of-war USS John Adams.

[3][8] Powell then served as an executive officer at the Washington Navy Yard for three years.

[3] During the American Civil War, Powell commanded the USS Potomac of the Union Navy, from August 20, 1861, to June 29, 1862.

He was buried at Oak Hill Cemetery in Washington, D.C.[1][3][10] Powell left an endowment in his will with the Columbian University to establish a naval school to "prepare young men...to enter the Naval Academy at Annapolis".