Tietjen is a German surname. Notable people with the surname include:
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Bettina Tietjen (born 1960), German television presenter
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Friedrich Tietjen (1834–1895), German astronomer
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Heinz Tietjen (1881–1967), German conductor
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Henry Roland Tietjen (1891-1976), American Legislator (Utah)
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James J. Tietjen (1933–2016), American researcher and executive
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John Tietjen (1928–2004), American Lutheran clergyman, theologian
Other uses
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2158 Tietjen, main-belt asteroid
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Wilhelm-Tietjen-Stiftung für Fertilisation, fertility research group
See also
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Tietjens
{{surname, Tietjen
German-language surnames