Yi County, under the jurisdiction of Baoding City, Hebei Province, is located in the northwest of Baoding City, at the east foot of the northern end of Taihang Mountains. The geographic coordinates are 114 ° 51 '- 115 ° 37' east longitude and 39 ° 02 '- 39 ° 35' north latitude. It is adjacent to Dingxing County in the southeast, Xushui District in the south, Mancheng District and Shunping County in the southwest, Laiyuan County in the west and Laishui County in the north. The total area is 2534 square kilometers. In 2021, Yixian County will have a permanent population of 501681.

In the first year of Emperor Kaihuang of Sui Dynasty (581), Yizhou was set on the north bank of Beiyi River; In the 16th year of Emperor Kaihuang's reign (596), Yi County was set up in the eastern two stars of the prefecture; In the ninth year of Daye (613), the state of Yi was renamed Shanggu County, which belonged to Shanggu County. In January 1995, Baoding District and Baoding City merged to establish a new Baoding City, which is subordinate to Baoding City. As of October 2021, Yi County has jurisdiction over 9 towns and 18 townships. The county people's government is located in Yizhou Town. Yixian County is located in the transitional inclined zone from Taihang Mountain to Pingyuan in North China, known as "seven mountains, one water and two fields". It belongs to warm temperate continental monsoon climate zone. In Yixian County, there are 39 national, provincial and county key cultural relics under protection, including the Western Tomb of the Qing Dynasty, the national key cultural relics protection unit Yanxiadu Site, the Great Wall Zijingguan, the Longxingguan Moral Sutra Tower (Laozi Moral Sutra Tower), the Beifudi Site, and the Shengta Courtyard Tower (Jingke Tower). There are dozens of revolutionary memorial sites, including the Memorial Tower of Wuyong Earth in Langya Mountain and the site of Zijingguan Anti Japanese Salvation Association.

In 2021, Yixian's GDP will reach 12.46 billion yuan, up 6.3% year on year. The added value of the primary industry was 3.176 billion yuan, up 4.1% year on year; The added value of the secondary industry was 2.426 billion yuan, up 1.2% year on year; The added value of the tertiary industry was 6.858 billion yuan, up 9.1% year on year. The structure of the three industries is 25.5:19.5:55.