Archaeologists have uncovered urban sites, bronze implements, and tombs that point to the possible existence of the Xia dynasty at locations cited in ancient Chinese historical texts. There exists a debate as to whether or not the Erlitou culture was the site of the Xia dynasty. Radiocarbon dating places the site at c. 2100 to 1800 BC, providing physical evidence of the existence of a state contemporaneous with and possibly equivalent to the Xia dynasty as described in Chinese historical works. In 1959, a site located in the city of Yanshi was excavated containing large palaces that some archaeologists have attributed to capital of the Xia dynasty. Through the 1960s and 1970s, archaeologists have uncovered urban sites, bronze implements, and tombs in the same locations cited in ancient Chinese historical texts regarding Xia; at a minimum, the era traditionally denoted as the Xia dynasty marked an evolutionary stage between the late neolithic cultures and the urban civilization of the Shang dynasty.
In 2011, Chinese archaeologists uncovered the remains of an imperial sized palace—dated to about 1700 BC—at Erlitou in Henan, further fueling the discussions about the existence of the dynasty.
Archaeological evidence of a large outburst flood that destroyed the Lajia site on the upper reaches of the Yellow River has been dated to about 1920 BC. This date is shortly before the rise of the Erlitou culture in the middle Yellow River valley and the Yueshi culture in Shandong, following the decline of the Longshan culture in the North China Plain. The authors suggest that this flood may have been the basis for the later myth, and contributed to the transition of cultures. They further argue that the timing is further evidence for the identification of the Xia with the Erlitou culture. However, no evidence of contemporaneous widespread flooding in the North China Plain has yet been found.