Spensley is a surname. Notable people by that name include:
Calvert Spensley (1846–1924), member of the Wisconsin State Senate. Howard Spensley (1834-1902), Australian lawyer and British Liberal politician. James Richardson Spensley (1867–1915), English doctor, footballer, manager, Scout Leader and medic from Stoke Newington. Philip Calvert Spensley (1920–1994), British tropical scientist.