The history of ancient Yuyao is rooted in deep antiquity, making this region one of the most important centers for the birth of civilization in eastern China. The earliest traces of human presence here are associated with the Hemudu culture (5000–4500 BC). Archaeological finds indicate that as far back as the Neolithic era, local residents successfully practiced rice cultivation and constructed sophisticated wooden buildings.
The official establishment of the city as an administrative unit occurred much later. In 200 AD, during the formation of the first centralized empires, Yuyao County was officially established as part of the Kuaiji Commandery. It was then that the county seat was founded, becoming the prototype for the modern city and an important economic hub in Zhejiang Province.
Geographical location and administrative reforms played a key role in the settlement's evolution. The name "Yuyao" (余姚) is deeply rooted in ancient Chinese toponymy and reflects the unique landscape features of the area. During the Sui and Tang dynasties, the city underwent many transformations, moving from one jurisdiction to another, which only emphasized its strategic significance for the central government.