Dina Vinhofvers (1620 – 7 July 1651) was a Danish silk worker who became famous because of her involvement in an alleged conspiracy of Corfitz Ulfeldt against King Frederick III of Denmark in 1650–51.
She was born in Copenhagen to German parents. Her mother, Margrethe Vinhofvers, is known to have had a position at the work house's staff. She married David Schumacher (d. 1650) in Holstein, had a daughter in 1640 and returned to Denmark in the late 1640s with her lover Lieutenant Jørgen Walter. She lived with her mother and daughter with the silk manufacturer Samson Gertzen and supported herself by silk ironing, but was also pointed out as a prostitute.
In 1650, she reported a plan to assassinate the king. She pointed out Corfitz Ulfeldt as the father of the child she expected; she also claimed to have overheard a conversation between Ulfeldt and Leonora Christina Ulfeldt, while she was laying in Ulfeldt's bed, in which they spoke of their plans to poison the king. Walter, the probable father of her child, who had become a favorite of the king and became ennobled in 1649, presented her accusations before the monarch. Walter is also believed to have been the one who instigated her to put forward her accusation to limit the influence of Ulfeldt, whose position was already risky because of his tense relationship with the king: Walter was close to the Danish-Holstein nobleman Christian Rantzau (1614–1663), who was an opponent of Ulfeldt. The accusation was put forward at a point when Ulfeldt's professional conduct was already under investigation. However, the accusations were kept secret by the king, who wished to examine them quietly.
In 1651, Walter was appointed councillor, which can be seen as a sign that the king had taken the accusations seriously. Vinhofvers now met Leonora Christina and Ulfeldt's confessor Simon Hennings and told them that Walter had plans to assassinate the Ulfeldt couple. Ulfeldt informed the king, who had Vinhofvers imprisoned at Copenhagen Castle and made the affair public. She retracted her former accusation against Ulfeldt during questioning, and claimed that the accusations had been fabricated by Walter. Ulfeldt was freed by the court, but Vinhofvers was sentenced to death for her first accusation. She was decapitated in the summer of 1651 outside the Copenhagen Castle.