The Chinese languages are the languages of the Han people, the major ethnic group of China. The Chinese languages are spoken by over one billion people. Approximately 95 percent of the Chinese population speaks Chinese, as opposed to the non-Chinese languages such as Tibetan, Mongolian, Lolo, Miao, and Tai spoken by minorities. The vast majority of the Chinese-speaking population is in China Mainland, but substantial numbers are also found throughout the whole of Southeast Asia, especially in Singapore, Indonesia, Malaysia, and Thailand. Important Chinese-speaking communities are also found in many other parts of the world, especially in Europe, North and South America, and the Hawaiian Islands.

Chinese has seven major language groups of which the Mandarin language group forms the largest group. The Mandarin group consists of a wide range of dialects in the northern, central, and western regions. The Cantonese dialects are spoken in Hong Kong, Guangdong, Southern Guangxi Zhuang Autonomous Region, parts of Hainan, Macau, and in many overseas settlements. The Hakka (Kejia) languages are spoken in Guangdong, southwestern Fujian, Jiangxi, Hunan, Yunnan, Guangxi, Guizhou, Sichuan, Hainan, Taiwan, Singapore, Malaysia, Indonesia, many overseas Chinese communities, and in pockets throughout Southeast Asia. Most of the inhabitants of the south central region, in Hunan use the Xiang dialects, also known as Hunanese. The Min dialects are spoken in most of Fujian, large areas of Taiwan and Hainan, parts of Eastern Guangdong and the Leizhou Bandao Peninsula, and in areas of Southeast Asia. Most of the people living in Jiangxi, eastern part of Hunan, and the southeastern corner of Hubei use the Gan dialects. The majority of the inhabitants of Zhejiang, as well as people living in southern areas of Jiangsu and Anhui, speak the Wu dialects. The Wu dialects share marginal mutual intelligibility with the Mandarin and Gan dialects.

Spoken Chinese comprises many regional variants, generally referred to as dialects. However, the mutual unintelligibility of the subvarieties is the main ground for classifying them as separate languages or dialect groups. Each dialect group consists of a large number of dialects, many of which may themselves be referred to as languages. The boundaries between one so-called language and the next are not always easy to define. Because each dialect group preserves different features of Middle Chinese (dating back to early or even pre-T'ang times), they have proven to be valuable research tools in the phonological reconstruction of Middle and even to some extent its ancestor, Old Chinese. Most Chinese speak one of the Mandarin dialects, which are largely mutually intelligible.