Hagel is a German surname. Notable people with the surname include:
Catherine Hagel (1894–2008), American supercentenarian
Chuck Hagel (born 1946), former American Secretary of Defense ("SecDef")
Frank Hagel (born 1933), American painter and sculptor
Glenn Hagel (born 1949), Canadian politician
John Hagel III, author and former consultant
Kyle Hagel (born 1985), Canadian ice hockey player
Lawrence B. Hagel, United States federal judge
Otto Hagel (1909–1973), German-born American photographer and filmmaker
