Thomas Jean William Blankenburg (September 2, 1909 – March 29, 1979) was an American competition swimmer who represented the United States as an 18-year-old at the 1928 Summer Olympics in Amsterdam, the Netherlands.

[1] Blankenburg advanced to the semifinals of the men's 200-meter breaststroke and placed ninth overall in the final standings.

[1][2] Blankenburg later attended the University of Oregon.

He qualified as a member of the U.S. swimming team for the 1932 Summer Olympics, but was disqualified as a "professional" when it was disclosed that he had worked as lifeguard.

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