Wulfstan of Hedeby (Latin Haithabu) was a late 9th century traveller and trader. His travel accounts, as well as those of another trader, Othere, were included in Alfred the Great's translation of Orosius' Histories.

According to this account, Wulfstan undertook a journey by sea from Hedeby to the trading center of Truso around the year 880. He met many people on his travels, including Danes, and he may have been the first person to use the word "Denmark" (or "Danemark") in his description.

In his 1991 book, Die Prussen. Ein sympathisches Volk zwischen Weichsel und Memel, Karl Baumann asserts that Wulfstan not only visited, but also lived in Truso, as well as in Sambia. According to Baumann, Wulfstan learned the customs and ways of his hosts, and he fondly remembered the times living amongst the people.