Riegel is a German surname. Notable people with the surname include:
Anton Pius Riegel (1789–?), Austrian architect
Bill Reigel (1932-1993) American basketball player and coach
E.C. Riegel (1879–1953), independent scholar, author and consumer advocate
Eden Riegel (born 1981), American actress
Franz Riegel (1843–1904), German internist and gastroenterologist
Hans Riegel (1923–2013), German entrepreneur
Hans Riegel, Sr. (1893-1945), German entrepreneur
Sam Riegel (born 1976), American voice actor, writer and director
Skee Riegel (1914–2009), American golfer
Tatiana S. Riegel, American film editor
