Yerkes

Yerkes is a surname. Notable people with the surname include:

• Charles Yerkes (1837–1905), American financier who played a major part in developing mass-transit systems in Chicago and London
• Robert Yerkes (1876–1956), American psychologist, ethologist, and primatologist
• Steve Yerkes (1888–1971), American baseball player

Yerkes may also refer to:

• Yerkes Observatory, an astronomical observatory of the University of Chicago
  • Yerkes luminosity classification of stars
  • Yerkes scheme of galaxy morphological classification
• Yerkes National Primate Research Center, one of eight national primate research centers funded by the National Institutes of Health, located in Atlanta, Georgia at Emory University
• Yerkes–Dodson law, an empirical relationship between arousal and performance first noted by Robert M. Yerkes and John Dillingham Dodson