Christian Detlev, Count von Reventlow (21 June 1671 – 1 October 1738) was a Royal Dano-Norwegian Army officer and diplomat.

[1] He was the son of Conrad, Count Reventlow, chancellor of Denmark, and his first wife, Anna Margarethe Gabel (1651–1678).

In 1701 he was sent at the head of the Danish troops to fight the French in Italy during the War of Spanish Succession, serving under Prince Eugene of Savoy (1663–1736).

In March 1713 King Frederick IV appointed Reventlow as the top official (overpræsident) of the city of Altona.

Opposite Hamburg, the harbor of Altona was on the banks of the Elbe river and at that time one of the more important Danish harbour towns.