Surname
- Adolph Daniel Edward Elmer (1870–1942), American botanist
- Ebenezer Elmer (1752–1843), American politician and physician
- Jonathan Elmer (1745–1817), American politician
- Rico Elmer (born 1969), Swiss ski mountaineer and mountain runner
- Rudolf Elmer, whistleblower that released documents about Swiss bank Julius Bär to WikiLeaks
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