The Lower Paleolithic era on the Korean Peninsula and in Manchuria began roughly half a million years ago. The earliest known Korean pottery dates to around 8000 BC, and the Neolithic period began after 6000 BC, followed by the Bronze Age by 2000 BC, and the Iron Age around 700 BC.
Similarly, according to The History of Korea, the Paleolithic people are not the direct ancestors of the present Korean people, but their direct ancestors are estimated to be the Neolithic People of about 2000 BC.
According to the mythic account recounted in the Samguk Yusa (1280s), the Gojoseon (Old Joseon) kingdom was founded in northern Korea and southern Manchuria in 2333 BC. In the 12th century BC Gija, a prince from the Shang dynasty of China, purportedly founded Gija Joseon. The first written historical record on Gojoseon can be found from the text Guanzi. Giza's founding of Gojoseon was believed to be true until the 19th century, but it is considered unfounded in modern times. Archaeologically, there are only various hypotheses about the founding process and exact period of Gojoseon, and the origin of the name Joseon is also unclear. However, it is clear that Gojoseon existed on the Korean Peninsula and Manchuria at the latest before the 4th century B.C., which can be seen frequently in the records of China's Spring and Autumn period.
The Jin state was formed in southern Korea by the 3rd century BC. In the 2nd century BC, Gija Joseon was replaced by Wiman Joseon, which fell to the Han dynasty of China near the end of the century. This resulted in the fall of Gojoseon and led to succeeding warring states, the Proto–Three Kingdoms period that spanned the later Iron Age.
From the 1st century BC, Goguryeo, Baekje, and Silla grew to control the peninsula and Manchuria as the Three Kingdoms of Korea (57 BC–668 AD), until unification by Silla in 676. In 698, King Go established the Balhae in old territories of Goguryeo, which led to the Northern and Southern States period (698–926) of Balhae and Silla coexisting.