English vocabulary and grammar have been changed and reshaped by several foreign influences through their contact with the English people. Different invaders caused a great difference in the northern and southern English dialect. Due to the contact between various invaders and the natives, these dialects exhibit differences in phonology, morphology, vocabulary and syntax. Norse invasions have influenced the English language, especially the northern part, while the southern part has been noticeably influenced by German invasions. The first Viking raids started in the 7th century. Over 300 years Vikings were invading the English territory, until the Norman invasion, which marked the end of the Viking Age. Territories like East Anglia, Lincolnshire and Northumbria have been raided and plundered. Norse settlers did not only leave their mark on the English territory, culture and history through war, trade and art but they also influenced a noticeable part of the language. Archaic words used before have vanished from the vocabulary, while a small number of words have managed to survive by adapting to the changes in the English language. The purpose of this paper is to distinguish and single out the Old Norse influences from other foreign influences as well as to classify historic influences from the linguistic influence and to establish how productive the Norse influence was on the English Language.