Tongxin County, which belongs to Wuzhong City of Ningxia Hui Autonomous Region, is located in the connection zone between Ordos Platform and the northern part of the Loess Plateau. The central location is about 36°58 '48 "north latitude and 105°54' 24" east longitude, with a total area of 4433.34 square kilometers. Tongxin is a typical temperate continental climate. By the end of 2021, the registered population of Tongxin County was 387,657. As of October 2021, Tongxin County has jurisdiction over 7 towns and 4 townships. County people's government in Yuhai town.

During the Xia, Shang and Zhou dynasties, it was the land of Yongzhou. In 1958, Ningxia Hui Autonomous Region was founded, Tongxin County directly under the autonomous region. In March 2019, it was listed as the first batch of counties under the protection and utilization of revolutionary cultural relics. In March 2020, Tongxin County dropped out of the poverty-stricken county list.

In 2021, Tongxin County achieved a gross regional product of 1,216,032 million yuan.