This essay is about the earliest sites in the county of Norrbotten, Sweden. The sites are dated to the Mesolitic period through radiocarbon dating. This essay includes an analysis which is based on the lithic material from fourteen archaeological examined sites in the county of Norrbotten. The aim of this essay is to investigate if there are any significant differences between the sites comparing lithic raw-materials and artifacts. The quantitative analysis confirms differences between the sites and their lithic material. There are visible differences within the raw-materials, artefacts and amount of lithic material. The possible reasons for differences in the lithic material are discussed through the essay: settlement patterns, chronology and geographical location of the sites.