Xiho County, belonging to Longnan City, Gansu Province, is located in the southeast of Gansu Province, the northern end of Longnan City, located in the Yangtze River Basin, the upper reaches of the West Han River. It is bordered by Hui County and Cheng County in the east, Wudu District and Kang County in the south, Li County in the northwest, and Li County and Qinzhou District in the northeast, with a total area of 1,861 square kilometers. As of October 2021, Xihe County is under the jurisdiction of 16 towns, 4 townships. 384 administrative villages, 10 communities, and 870,000 acres of arable land. As of 2022, Xihe County has a resident population of 348,800. The county people's government is located in Hanyuan Town.
According to the Yuan Yitongzhi, it was named He County because of the peace talks between Song and Jin. And because of the renaming with Anhui's He County, so add the word west. Lead, zinc, antimony, copper, gold and other mineral resources are abundant, the territory of the provincial cultural relics protection unit 5, there are Yunhuashan, eight peaks of cliffs and Qiuchi Mountain and other tourist attractions, including the evening lake for the national 4A level tourist attractions. It is the hometown of Chinese begging culture. In 2020, the People's Government of Gansu Province approved the exit of Xihe County from the sequence of poverty-stricken counties.
In 2023, the gross regional product of Xihe County was 4.774 billion yuan, a year-on-year growth of 7.0%.