Princess Margaretha of Sweden (Margaretha Sofia Lovisa Ingeborg; 25 June 1899 – 4 January 1977) was a member of the Swedish Royal Family and a Princess of Denmark by marriage. She was the elder sister of Märtha, Crown Princess of Norway and Queen Astrid of the Belgians.

The eldest child and daughter of Prince Carl, Duke of Västergötland, and Princess Ingeborg of Denmark, she was born Princess Margaretha of Sweden and Norway (later just "of Sweden", due to the dissolution of the union between Norway and Sweden in 1905) in .

In 1916 Margaretha's confirmation attracted enthusiastic press coverage; the event was said to mark the beginning of a new age for the Swedish royal house, which had lacked princesses for so long.

On 22 May 1919, at the Storkyrkan, Stockholm, she was married to Prince Axel of Denmark, her maternal first cousin once removed. The marriage was a love match; her mother remarked that the couple were so much in love that they could not be left alone in a furnished room. Her wedding was celebrated with great festivities in Stockholm.

They had two sons:

She was a maternal aunt of King Harald V of Norway and Kings Baudouin and Albert II of Belgium; and paternal grandaunt of King Philippe of Belgium and Grand Duke Henri of Luxembourg.

Margaretha adjusted herself well in Denmark, which she had often visited on family occasions during her upbringing. She lived a private life devoted to her family on the estate Bernstorffshøj in Gentofte and generally avoided publicity, and kept in close contact with her relations abroad. She was interested in social issues in Sweden, and became the patron of several charity organisations in Denmark, and was the chairperson of Gentofte Børnevenner.

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