The population density of colonists living across most of the Appalachian Mountain region during the colonial period was approximately 1 to 2 colonists per square mile, indicating a sparse settlement due to the rugged terrain and limited farming opportunities. Some sources mention 2-3 colonists per square mile or "six or more" in the late 18th century, but the consensus points to a low density around 1 to 2 colonists per square mile across most of the region.