Tietjens is a surname. Notable people with the surname include:
Carl Tietjens (born 1986), Australian cricketer Doug Tietjens (born 1984), New Zealand rugby player Edwin Tietjens (1894–1944), German psychiatrist Eunice Tietjens (1884–1944), American writer Gordon Tietjens (born 1955), New Zealand rugby coach Jim Tietjens (born 1960), American soccer player Norman O. Tietjens (1903–1983), American judge Paul Tietjens (1877–1943), American composer Thérèse Tietjens (1831–1877), German soprano
See also Tietjen