The name Bill or Billy might refer to:
- Bill (Admiral), 23rd century Starfleet Fleet Admiral
- Bill (Borg), identity of a Borg drone, as identified by Magnus Hansen
- Billy (Carbon Creek), a resident of Carbon Creek in the 1950s
- Billy (Starfleet), an officer aboard the Enterprise NX-01
- See also
- Billy Claiborne, referred to as "Billy"
- William T. Riker, rarely nicknamed "Bill" or "Billy"
- William Ross, nicknamed "Bill"
- William Samuels, nicknamed "Bill"
- William Telfer, referred to as "Billy"
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