Sam Fuller
- Full Name: Michael Samuel Fuller, Jr.
- First name Sam per "Charlie X", Errand of Vengeance
- Father's name given alternatively as "Sam Sr." in The Edge of the Sword, "Michael" in Killing Blow, Errand of Fury
- Above name a compromise
- Species: Human
- Gender: Male
- Father: Michael Fuller
- By February 2266: Lieutenant, security section chief, Starfleet; USS Enterprise (TOS: "Charlie X"; TOS Novel: Errand of Vengeance: The Edge of the Sword)