China's population is approximately 1.41 billion, making it one of the two most populous countries in the world alongside India. While it experienced rapid population growth in the mid-20th century, the implementation of the "One-Child Policy" (1980–2015) and rapid urbanization have led to a significant demographic transition. Today, China faces an aging population and a declining birth rate, prompting the government to shift to a two-child, and recently a three-child, policy.
The country is highly urbanized, with over 60% of the population living in cities. The Han Chinese constitute the overwhelming majority (approx. 91%). The government officially recognizes 55 ethnic minority groups, the largest being the Zhuang, Uyghur, Hui, Manchu, and Tibetan peoples.
While China is officially an atheist state, spiritual practices are widespread. The dominant belief systems intertwine Buddhism, Taoism, and traditional Chinese folk religions. There are also significant populations of Christians and Muslims. Standard Chinese (Mandarin) is the official language, though numerous regional dialects and minority languages (such as Cantonese, Shanghainese, Tibetan, and Uyghur) are spoken daily.

