Dee Leon Mewbourne (born December 9, 1961) is a retired United States Navy vice admiral who served as 16th deputy commander of United States Transportation Command between July 2, 2019 and June 29, 2022.

He is an honor graduate of the United States Naval Test Pilot School and completed the navy's Nuclear Power Program, Air Command and Staff College (ACSC), Joint Forces Staff College, and numerous executive education courses.

Mewbourne holds the rare distinction of serving as commanding officer of three nuclear aircraft carriers.

After transitioning to the EA-6B Prowler aircraft, he served as the executive officer of VAQ-139 aboard Abraham Lincoln.

Ashore, Mewbourne served as a flight instructor with VA-42, the East Coast A-6E Fleet Replacement Squadron (FRS), and project officer at the Strike Aircraft Test Directorate.