Xihe County (Chinese: 西和县; pinyin: Xīhé Xiàn) is a county under the administration of the prefecture-level city of Longnan, in the southeast of Gansu Province of China.

The county seat is located in the town of Hanyuan (汉源镇).

To avoid confusion with He County in Anhui, the name later was changed to Xihe.

[4] Xihe has a mainly agricultural economy, crops include Chinese medicinal plants – particularly pinellia, potatoes, forestry and fruits.

[1] The Qiqiao Festival celebrations in Xihe were included as national intangible cultural heritage.