The Han Chinese, alternatively the Han people or the Chinese people, are an East Asian ethnic group native to Greater China. With a global population of over 1.4 billion, the Han Chinese are the world's largest ethnic group, making up about 17% of the world population. The Han Chinese represent 91.11% of the population in China and 97% of the population in Taiwan. They also make up roughly 75% of Singapore's population and are a significant diasporic group in other Southeast Asian countries such as Thailand, Malaysia, and Indonesia.

The Han Chinese have exerted a primary formative influence in Chinese culture and history. Originating from Zhongyuan, the Han Chinese trace their ancestry and culture to the Huaxia people, a confederation of agricultural tribes that lived along the middle and lower reaches of the Yellow River in the north central plains of China.

Han Chinese people and culture later spread southwards in the Chinese mainland, driven by large and sustained waves of migration during successive periods of Chinese history, for example the Qin (221–206 BC) and Han (202 BC – 220 AD) dynasties, leading to a demographic and economic tilt towards the south, and the absorption of various non-Han ethnic groups over the centuries at various points in Chinese history. The Han Chinese became the main inhabitants of the fertile lowland areas and cities of Southern China by the time of the Tang and Song dynasties, with minority tribes occupying the highlands.