Horsley is a surname. Notable people with the surname include:
Alec Horsley of Hull, founder of Northern Foods
Cuthbert Horsley, British MP
David Horsley (1873–1933), English-American pioneer of the motion picture industry
John Horsley (disambiguation), multiple people
Lee Horsley, (born 1955), American actor
Matt Horsley (born 1972), Australian footballer
Neal Horsley (born 1944), American political figure of the far right
Peter Horsley (1921–2001), Air Marshal of the Royal Air Force
Richard A. Horsley (born 1939), American theologist and philologist
Ron Horsley (born 1977), American author and artist
Samuel Horsley (1733–1806), British churchman and bishop of Rochester
Sebastian Horsley (1962–2010), English writer and artist
Valerie Horsley, American developmental biologist
Victor Horsley (1857–1916), English neurosurgeon and scientist
William Horsley (1774–1858), English organist and composer