Tongguan County, subordinate to Weinan City of Shanxi Province, is located at the east end of Guanzhong Plain of Shanxi Province, adjacent to Lingbao City of Henan Province in the east, Huayin City in the west, Luonan County in the south, Dali County in the northwest, and Ruicheng County of Shanxi Province across the Yellow River in the north. Between east longitude 110°09 '32 "-- 110°25' 27", north latitude 34°23 '33 "-- 34°39' 01", the total area of 526 square kilometers. It has jurisdiction over 1 street and 4 towns.

Tongguan has a long history and business call Chen, said zhou nutrient-laden Rui, during the spring and autumn for Chen. In the fifth year of Emperor Gaoxu of the Western Han Dynasty (202 BC), Tongguan established Chuansagong Yamen, which was later renamed Chuansagong County. Tongguan County was merged into Huayin County twice from the end of the Eastern Han Dynasty to the beginning of the Qing Dynasty, totaling more than 1500 years.

By the end of 2021, Tongguan County has a permanent population of 123,700. In 2021, Tongguan County has achieved a gross regional product of 4.74 billion yuan, in which the added value of the primary industry is 680 million yuan, the secondary industry is 1.38 billion yuan and the tertiary industry is 2.67 billion yuan.