Detmer (or Detmers) is a surname. It may refer to:
A. M. Detmer (c. 1885), U.S. tailor (see A. M. Detmer House) Amanda Detmer (born 1971), U.S. actress Don E. Detmer (born ?), U.S. doctor and professor Freda Detmers (1867-1934), U.S. botanist Hendrik Detmers (1761–1825), Dutch general Joseph Detmer (born 1983), U.S. decathlete and icosathlete Julian Francis Detmer (1865–1958), U.S. business man (see Detmer Woolen Company) Koy Detmer (born 1973), U.S. football player Maruschka Detmers (born 1962), Dutch actress Reid Detmers (born 1999), American baseball player Theodor Detmers (1902–1976), German naval commander Ty Detmer (born 1967), U.S. football player Wilhelm Detmer (1850–1930), German botanist and agriculturalist