Prince Viggo, Count of Rosenborg (Viggo Christian Adolf Georg, 25 December 1893 – 4 January 1970) was a Danish prince. He was born in Copenhagen the youngest son of Prince Valdemar of Denmark and Princess Marie of Orléans.

Without the legally required permission of the Danish king for a dynastic marriage, Viggo married Eleanor Margaret Green (New York City, New York, 5 November 1895 – Copenhagen, 3 July 1966), in New York City, New York, on 10 June 1924.

As became customary in the Danish royal house upon marriage to a commoner, prior to the wedding Viggo renounced his place in Denmark's line of succession to the Crown, forfeiting his title of Prince of Denmark, and his style of Royal Highness. With the king's authorisation, he assumed the title "Prince Viggo, Greve af (Count of) Rosenborg" and the style of Highness on 21 December 1923. Although the comital title was made hereditary for all of his legitimate descendants in the male line, the princely title was restricted to himself and his wife alone (i.e. "Prince and Princess Viggo", etc.). The couple had no children.

Prince Viggo died in Ebeltoft in 1970.

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