Longley is a surname, and may refer to:

• Avard Longley (1823–1884), Canadian politician from Nova Scotia; served in the House of Commons 1878–82
• Bernard Longley (born 1955) is the archbishop of Birmingham since 2009
• Bill Longley (gunfighter) (1851–1878), American outlaw and gunfighter in the Old West
• Bill Longley (speedway rider) (born 1914), Australian speedway rider
• Blair Longley (b. 1950), Canadian politician and marijuana activist
• Charles Thomas Longley (1794–1868), British Anglican Church priest; Archbishop of York; Archbishop of Canterbury 1862–68
• Clifford Longley, English journalist and author.
• Clint Longley (born 1952), American professional football player
• Edna Longley (born 1940), Northern Irish literary critic
• Harry Sherman Longley (1868-1944), Episcopal bishop in the United States
• James B. Longley, Jr. (born 1951), American politician from Maine; U.S. representative 1995–97; son of James B. Longley (governor)
• James B. Longley (1924–1980), American politician from Maine; governor of Maine 1975–79
• James Longley (filmmaker), American documentary filmmaker
• James Wilberforce Longley (1849–1922), Canadian journalist, judge, and politician; served in the Nova Scotia legislature
• Jim Longley (born 1958), Australian accountant and politician; served in the New South Wales legislature 1986–96
• John Longley (1867–1953), British Army officer
• John B. Longley (1830–1892), American lawyer and politician
• Luc Longley (born 1969), Australian professional basketball player
• Michael Longley (born 1939), Northern Ireland poet
• Mitch Longley (born 1965), American film and television actor
• Sarah Longley (born 1975) Northern Irish painter
• Thomas James Longley (born 1989), British actor
• Ty Longley (1971–2003), American guitarist and singer in the band Great White
• Vicky Longley (born 1988), British actress
• Victoria Longley (Australian actress) (born 1987), Australian actress