Nyhan is a surname. Notable people with the surname include:
- Brendan Nyhan (born 1978), American liberal to moderate political blogger, author, and political columnist
- David Nyhan (1940–2005), journalist
- Denis Nyhan, driver of standardbred racehorses in New Zealand's premier racing events
- William Nyhan (born 1926), Professor of Pediatrics at UC San Diego School of Medicine in La Jolla, CA
See also
edit- Lesch–Nyhan syndrome (LNS), a rare, inherited disorder caused by a deficiency of the enzyme hypoxanthine-guanine phosphoribosyltransferase
- Sakati–Nyhan–Tisdale syndrome, a rare genetic disorder associated with abnormalities in the leg bones, congenital heart defects and craniofacial defects