Messmer is a surname. Notable people with the surname include:
- Henry Messmer (1866–1899), Swiss-American architect
- Ivan Messmer (1931–2015), Canadian politician
- John Messmer (1884–1971), American athlete
- Léon Messmer (1900–1987), French Roman Catholic bishop in Madagascar
- Magali Messmer (born 1971), Swiss triathlete
- Mark Messmer, American politician
- Mindi Messmer, American politician
- Nikolaus Messmer (1954–2016), Russian Roman Catholic bishop, Apostolic administrator or Kyrgyzstan
- Otto Messmer (1892–1983), American animator
- Otto Messmer (Jesuit) (1961–2008), Russian Jesuit priest, head of Jesuits in the CIS
- Pearl Ray Messmer (1892–?), Australian orchidologist
- Pierre Messmer (1916–2007), French Prime Minister
- Sebastian Gebhard Messmer (1947–1930), Swiss-born Roman Catholic archbishop of Milwaukee
- Wayne Messmer (born 1950), announcer for the Chicago Cubs
- Messmer (hypnotist), stage name of Éric Normandin (born 1971), French Canadian hypnotist
Source : Wikipedia 
