Agent 38 may refer to:
- CONTROL courier and an "old friend" of Maxwell Smart. 38 is the first agent known to have been impersonated by a member of the KAOS League of Impostors. After the fake 38 tells Max that "Mrs. 38" is expecting a "fraction", Max advises the real 38 to "go home and check". [Portrayed by Del Moore, Episode #63: "The Spy Who Met Himself".]
- Harry "Kitty" Karvelas. CONTROL disguise expert posing as a chorus girl at the Golden Rooster Follies Theatre. [Portrayed by Karen Arthur, Episode #91: "The Worst Best Man".]