Summerhays is an English surname. Notable people with the surname include:
Bob Summerhays (1927–2017), American football player Bruce Summerhays (born 1944), American golfer and Mormon leader Daniel Summerhays (born 1983), American golfer Gary Summerhays (1950–2021), Canadian boxer Jane Summerhays (born 1944), American actress R. S. Summerhays (d. 1976), British expert and author in equine matters Robert R. Summerhays (born 1965), American judge