The early history of Cambodia follows the prehistoric and protohistoric development of Cambodia as a country in mainland Southeast Asia. Thanks to archaeological work carried out since 2009 this can now be traced back to the Neolithic period. As excavation sites have become more numerous and modern dating methods are applied, settlement traces of all stages of human civil development from neolithic hunter-gatherer groups to organized preliterate societies are documented in the region.

Prehistoric Asia refers to events in Asia during the period of human existence prior to the invention of writing systems or the documentation of recorded history. This includes portions of the Eurasian land mass currently or traditionally considered as the continent of Asia. The continent is commonly described as the region east of the Ural Mountains, the Caucasus Mountains, the Caspian Sea, Black Sea and Red Sea, bounded by the Pacific, Indian, and Arctic Oceans. This article gives an overview of the many regions of Asia during prehistoric times.