Prince Erik, Count of Rosenborg (Erik Frederik Christian Alexander; 8 November 1890 – 10 September 1950) was a Danish prince. He was born in Copenhagen, a son of Prince Valdemar of Denmark and Princess Marie of Orléans.

As was then customary in the Danish royal house, Erik renounced his rights to the throne when he chose to take a commoner as wife, marrying in Ottawa, Ontario, on 11 February 1924 Lois Frances Booth (Ottawa, Ontario, 2 August 1897 – Copenhagen, 26 February 1941). With the king's permission, he took the title "Prince Erik Count of Rosenborg", and retained his right to the style of Highness, while forfeiting that of Royal Highness. His wife was the daughter of John Frederick Booth, who lived in Canada, and the paternal granddaughter of John Rudolphus Booth by his wife Rosalinda Cook, from whom he was divorced in 1937. She later remarried Thorkild Juelsberg, without issue.

The couple had two children:

Prince Erik died in Copenhagen in September 10, 1950.

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