Eifler is a surname. Notable people with the surname include:
Brian S. Eifler (born 1968), U.S. Army officer Carl F. Eifler (1906–2002), American police officer and U.S. Army officer Erna Eifler (1908–1944), German resistance member Larissa Eifler (born 1999), German fencer Milo Eifler (born 1998), American football player