Mayr is a German surname. Notable people with the surname include:
Andrea Mayr (born 1979), Austrian female long-distance runnerErnst Walter Mayr (1904–2005), German American evolutionary biologistGeorg Mayr (1564–1623), German statistician and economistGustav Mayr (1830–1908), Austrian entomologistHeinz Mayr (born 1935), German racewalkerJohann Simon Mayr (1763–1845), German composerKarl Mayr (1883–1945), German politician and officerMichael Mayr (1864–1922), Austrian historian, politician and Bundeskanzler (1920/21)Rupert Ignaz Mayr (1646–1712), German composerSimon Marius (1573–1624), German astronomerHans Mayr (disambiguation)