Hartzog is a German surname. It is a variant of Herzog. Notable people with the surname include:
Corey Hartzog, American voice actor George B. Hartzog Jr. (1920–2008), American attorney Henry Simms Hartzog (1866–1953), American academic and school administrator Malcolm Hartzog, American college football safety Melanie Hartzog, American social services administrator William W. Hartzog (1941–2020), American general W. Lawrence Hartzog Sr. (1930–2004), American entrepreneur
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