Count Christian of Nassau-Siegen (16 July 1616 – 1/11 April 1644), , official titles: Graf zu Nassau, Katzenelnbogen, Vianden und Diez, Herr zu Beilstein, was a count from the House of Nassau-Siegen, a cadet branch of the Ottonian Line of the House of Nassau. He served as an officer in the Hessian Army and the Imperial Army successively.
Christian was born at on 16 July 1616 as the sixth son of Count John VII 'the Middle' of Nassau-Siegen and his second wife, Duchess Margaret of Schleswig-Holstein-Sonderburg.
The will and testament of Count John VII 'the Middle' of 1621 bequeathed John Maurice and his younger brothers from their father's second marriage the district of Freudenberg, some villages in the Haingericht and a third part of the administration of the city of Siegen. After his older half-brother John 'the Younger' had accepted the homage of the city of Siegen for the entire county of Nassau-Siegen on 12 January 1624 and had voluntarily ceded the sovereignty over the Hilchenbach district with and some villages belonging to the and Netphen districts to his younger brother William on 13/23 January 1624, Christian and his brothers, with the exception of the oldest two brothers John Maurice and George Frederick, accepted only modest appanages.
Christian studied in Leiden in 1631. He attended the Siege of Maastricht in 1632. In 1633 he entered the Hessian service. He was wounded in the fight for Hanau in 1636. In 1642 he entered the Imperial Army and became colonel of the cuirassiers. He was killed in action near Düren on 1/11 April 1644 and was buried in the in the in Dillenburg on 4/14 June 1644. At a hitherto unknown time his body was transferred to Siegen to be interred in the there.
Christian married around 1641 to Anna Barbara von Quadt-Landskron-Rheinbach (from the noble family ). The marriage remained childless.