Killbuck may refer to:

• Bemino (fl. 1710s–1780s), known as John Killbuck Sr, medicine man and war leader of Delaware (Lenape) and Shawnee warriors
• Gelelemend (1737–1811), known as John Killbuck Jr, Bemino's son, Delaware (Lenape) chief
• Killbuck Township, Holmes County, Ohio, U.S.
  • Killbuck, Ohio
  • Killbuck Creek
• Killbuck Creek (Kishwaukee River tributary), Illinois, U.S.

• Kilbuck (disambiguation)
• Lenape, an indigenous people of the Northeastern Woodlands