Heil is a surname. Notable people with the surname include:
Bob Heil (1940–2024), American sound and radio engineer, founder of Heil Sound
Hubertus Heil (born 1972), German politician
Jennifer Heil (born 1983), Canadian freestyle skier
Jerry Heil (born 1995), Ukrainian singer
John Heil (born 1943), American philosopher
Julius P. Heil (1876–1949), American politician, 30th governor of the State of Wisconsin
Manon Heil (born 1997), French association football player
Mechthild Heil (born 1961), German politician
Oskar Heil (1908–1994), German electrical engineer, inventor of the air motion transformer
Reinhold Heil (born 1954), German-American composer