Taiyuan (Taiyuan Jin: [tʰai˦˥ ye˩˩]) is the capital of Shanxi, China. Taiyuan is the political, economic, cultural and international exchange center of Shanxi Province, containing an industrial base focusing on energy and heavy chemicals. Throughout its long history, Taiyuan was the capital or provisional capital of many dynasties in China, hence the name Lóngchéng (龙城; Dragon City).

As of 2021, the city governs 6 districts, 3 counties, and hosts a county-level city with a total area of 6,988 square kilometers and a permanent population of 5,390,957.

Taiyuan is located roughly in the centre of Shanxi, with the Fen River flowing through the central city.

The two Chinese characters of the city's name are 太 (tài, "great") and 原 (yuán, "plain"), referring to the location where the Fen River leaves the mountains and enters a relatively flat plain. Throughout its long history, the city had various names, including Bīngzhōu (并州) (from which the city's abbreviated single-character name Bīng (并) is derived), Jìnyáng (晋阳) and Lóngchéng (龙城).

During the Tang dynasty and subsequent Five Dynasties, the status of the city of Taiyuan was elevated to be the Northern Capital, hence the name Běidū (北都), and Běijīng (北京, different from present-day Beijing).

Taiyuan is an ancient city with more than 2500 years of urban history, dating back from 497 BC. It was the capital or secondary capital (陪都, 别都) of Zhao, Former Qin, Eastern Wei, Northern Qi, Northern Jin, Later Tang, Later Jin, Later Han, Northern Han. Its strategic location and rich history make Taiyuan one of the economic, political, military, and cultural centers of Northern China.

From about 859 BC the area around modern-day Taiyuan was occupied by the Rong people. In 662 BC the Rong were driven out by the Di people.

In 497 BC, the first ancient city of Jinyang was built around the southern Jinyuan District of present-day Taiyuan, by Dong Anyu (董安于), who was a steward of Zhao Jianzi [zh] (赵鞅), an upper-level official of the state of Jin.