Huixian County is subordinate to Longnan City, Gansu Province. It is named after the Huishan Posthouse at the foot of Huishan Mountain in the north corner of the city. It is located in the southeast of Gansu Province and the northeast of Longnan City. It is located in the Huicheng Basin at the south foot of Qinling Mountains and in the Qinba Mountains at the upper reaches of Jialing River. It borders Tianshui City in the north, Liangdang County in the east, Chengxian County in the west, and Lueyang County in Hanzhong City, Shaanxi Province in the southeast. Hui County has jurisdiction over 13 towns, 2 townships and 213 administrative villages, with a total area of 2722 square kilometers. By 2021, the permanent population of Huizhou County was 189107, including 85168 urban residents.

Huixian County is known as "the small south of the Yangtze River on the Long River", with a warm and humid climate, alternating hills and basins. There are three scenic spots in Huixian County, Jialing River rafting, Qingni Ridge and other scenic spots. Famous specialties include walnuts, gingko, wolfberry honey, kiwi fruit, flue-cured tobacco, etc.

On April 28, 2019, the Gansu Provincial Government approved the official withdrawal of Huizhou County from the poverty-stricken counties.

In 2020, the total output value of Huizhou County was 5.1 billion yuan, up 2.9% year on year. Among them, the added value of the primary industry was 1.049 billion yuan, up 4% year on year; The added value of the secondary industry was 1.685 billion yuan, up 1.3% year on year; The added value of the tertiary industry was 2.366 billion yuan, up 3.7% year on year. The three industrial structures were adjusted from 20.2:34.9:44.8 in the previous year to 20.6:33:46.4.