Kaegi or Kägi is a surname. Notable people with the surname include:
Adriana Kaegi (born 1957), Swiss entertainer Dieter Kaegi (born 1957), Swiss opera director Fritz Kaegi (born 1971), American politician Gottfried Kägi (1911–?), Swiss skeleton racer Walter Kaegi (1937–2022), American historian Werner Kaegi (1901–1979), Swiss historian Werner Kaegi (composer) (1926–2024), Swiss electronic music composer, musicologist and educator
See also Kägi Söhne, Swiss biscuit and chocolate company