Dingxi is a prefecture-level city in Gansu province, People's Republic of China.

Dingxi may also refer to:

Dingxi metro station, a metro station of the Taipei Metro Dingxi North railway station, a railway station of Baoji–Lanzhou High-Speed Railway Dingxi railway station, a station on Longhai railway Dingxi Village (頂溪里), a village in Yonghe District, New Taipei City, Taiwan

See also Tingxi