Micklethwaite is a surname. Notable people with the surname include:
F. W. Micklethwaite, (1849–1925), Canadian photographer Sir John Micklethwaite, (1612–1682), English physician John Thomas Micklethwaite, (1843–1906), English architect Joseph Micklethwaite, 1st Viscount Micklethwaite, (c. 1680–1734) English politician, peer and diplomat
See also John Micklethwait Micklethwaite (disambiguation)