Reginald Carr or Reg Carr may refer to:
- Reg Carr (footballer) (1934–2011), Australian rules footballer
- Reginald Carr (librarian) (born 1946), former Bodley's Librarian at the University of Oxford
- Reginald Carr (born 1977), American murderer and perpetrator of the 2000 Wichita Massacre
- Kansas v. Carr, 2016 U.S. Supreme Court case arising from the Wichita Massacre
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