Vitslav I (c. 1180 – 7 June 1250), variously called Vislav, Vizlav, Wislaw, Wizlaw and Witslaw in English sources, was a prince of Rügen.
In 1219, Vitslav took part in a campaign by his feudal lord, the King of Denmark Valdemar II, to Estonia.
Following the resignation of his brother, Barnuta, Vitslav I was mentioned in documents in 1221 as the Prince of Rügen.
This year is also first time that there is a record of German settlers in the mainland territories of Rügen.
With his wife Margarete (before 1200 - 5 March 1232), probably a niece of bishop Absalon and possibly a daughter of Sverker II of Sweden and Benedicta Ebbesdotter of Hvide, he had six sons whose names are known: