Lilly is a surname. Notable people with the surname include:
Armistead Abraham Lilly (1878–1956), American lawyer, politician, and businessperson Bob Lilly (born 1939), American football player and photographer David Lilly (born 1986), Scottish footballer and head coach Doris Lilly (1922-1991), writer ("How to Marry a Millionaire," "How to Make Love in Five Languages", etc.) Edward P. Lilly (1910–1994), American historian, founder of the CIA Psychological Bureau Services Eli Lilly (disambiguation), several people Evangeline Lilly (born 1979), Canadian actress George Lilly (1770s–1846), Canadian lawyer, official, and judge Gweneth Lilly (1920–2004), Welsh writer and teacher Jim Lilly (born 1981), American politician John Lilly, several people Joseph Lilly (1893–1952), American Vincentian priest and Scripture scholar Josiah K. Lilly Jr. (1893–1966), American industrialist Josiah K. Lilly Sr. (1861–1948), American industrialist Ken Lilly (born 1959), Australian cricketer Kenneth Norman Lilly (1929–1996), British artist Kevin Lilly (born 1963), American football player Kristine Lilly (born 1971), American soccer player Mary Lilly (1859–1930), American politician and social activist Mike Lilly (comics), American comic book artist Mike Lilly (musician) (1950–2020), American banjoist and singer Paul Douglas Lilly (born 1969), American judge Samuel Lilly (1815–1880), American politician from New Jersey Ted Lilly (born 1976), American former baseball pitcher The Lilly Brothers, American bluegrass musicians Thomas Jefferson Lilly (1878–1956), American politician William Lilly (disambiguation), several people