Lawn is a surname. Notable people with the surname include:
Chris Lawn (born 1972), former Gaelic footballer
Chris Lawn (philosopher), Irish philosopher
Connie Lawn (1944–2018), American journalist and White House correspondent
Edward Lawn (1879–1961), Canadian politician and merchant
Jim Lawn (1902–1972), Australian rules footballer
Joanna Lawn (born 1973), New Zealand ironman triathlete
John C. Lawn (born 1935), American former police officer and FBI agent, 4th Administrator of the Drug Enforcement Administration
John J. Lawn, American politician elected in 2011
John Lawn (miner) (1840–1905), New Zealand gold miner and mine manager
Lewis Lawn (1929–1980), New Zealand weightlifter
Mark Lawn (born 1960), former co-chairman of Bradford City Association Football Club
Philip Lawn, Australian professor of economics
Sam Lawn (1906–1971), Australian politician