Ratibor (or Ratse) (died 1043) was a prince of the Obotrite confederacy from the Polabian tribe.
After Saxons killed Prince Udo of the Obotrites in 1028, his son Gottschalk was taken to be raised at the court of Canute the Great of Denmark.
Sven Estridson, Jarl of Denmark, desired independence from King Magnus I of Norway in 1042.
Because Magnus was supported by his brother-in-law, Duke Bernard II of Saxony, Sven achieved an alliance with the Obotrites through the mediation of Gottschalk.
In an attempt to avenge their father, his sons were killed in the same year in a battle at Lürschau Heath on 28 September.