Alexander Gordon Lyle (November 12, 1889 – July 15, 1955) was an officer in the United States Navy who received the Medal of Honor for his actions during World War I.

He accepted a commission in the navy as a lieutenant (junior grade) in 1915 while living in Massachusetts and retired August 1, 1948, at the rank of vice admiral.

Lyle was serving as a dental officer with the 5th Regiment of the United States Marine Corps on the French front during World War I.

He saved the corporal's life by treating his wounds using surgical aid and became one of only three dental officers in history to receive the Medal of Honor.

In addition to the Medal of Honor, Lyle also received the Legion of Merit, the Silver Star (with palms) and the Italian War Cross.