Leiter, a surname, may refer to:
- Al Leiter, a Major League Baseball pitcher
- Brian Leiter, an American philosopher and legal scholar
- Felix Leiter, a fictional character in the James Bond series
- Ken Leiter, a retired American National Hockey League player.
- Levi Leiter, a Chicago businessman
- Mark Leiter, a Major League Baseball pitcher and brother of Al
- Mark Leiter, Chairman of The Demand Institute
- Michael Leiter, former director, National Counterterrorism Center
- Leiter, Wyoming, a community in the United States
- The Leiter Report, a report on university professors of philosophy edited by Brian Leiter
- The Second Leiter Building, also known as the Sears Building, in Chicago
- Leiter International Performance Scale, an intelligence test
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