Reilley is both a surname and a given name. Notable people with the name include:
Surname:
- Charlie Reilley (1856–1904), American baseball player
- Duke Reilley (1884–1968), American baseball player
- Hugh Reilley (1918–1940), Canadian World War II pilot
- Thomas T. Reilley (1883–1940), American football coach
- Fiona Reilley (2009-Present), Prayer writer
Given name:
- Reilley Rankin (born 1979), American golfer