Ringer is a surname. Notable people with the surname include:

Entrepreneurs

• Frederick Ringer (1838–1907), British merchant
• Robert Ringer (born 1938), American entrepreneur

Performers

• Catherine Ringer, French performer
• Jenifer Ringer, American ballet dancer and teacher
• Noah Ringer (born 1996), American actor

Sportspeople

• Antony Ringer (born 1966), British sport shooter
• Derek Ringer (born 1956), Scottish rally co-driver
• Jamie Ringer (born 1976), Welsh rugby player
• Javon Ringer (born 1987), Michigan State University running back
• Joel Bennett Ringer (born 1996), Welsh rugby player
• Paul Ringer (born 1948), Welsh rugby player
• Richard Ringer (born 1989), German runner
• Thomas Ringer (1883–1969), British boxer
• Tiana Ringer (born 1985), American wrestler

Writers

• Armand T. Ringer, a pseudonym used by American writer Martin Gardner
• Mark Ringer (born 1959), American writer and theatre director

Others

• Barbara Ringer (1925–2009), American civil servant
• Carolyn Ringer Lepre, American academic administrator
• Herb Ringer (1913–1998), American photographer
• Sydney Ringer (1836–1910), British clinician and pharmacologist, best known for inventing Lactated Ringer's solution