Fernow is a surname. Notable people with the surname include:
Bernhard Fernow (1851–1923), American forestry academic Bernice Pauahi Fernow (1881–1969), American miniature painter Berthold Fernow (1837–1908), American historian, writer and librarian Dominick Fernow, American musician Karl Ludwig Fernow (1763–1808), German art critic and archaeologist