Jiashan County is a county under the jurisdiction of Jiaxing City, Zhejiang Province, located in the northeast of Jiaxing City, at the intersection of Jiangsu, Zhejiang and Shanghai provinces and one city. Its borders are Tian-shaped, bordering Qingpu District and Jinshan District of Shanghai in the east, pinghu city District and Nanhu District of Ang Lee of Jiaxing City in the south, Xiuzhou District of Jiaxing City and Wujiang District of Suzhou City of Jiangsu Province in the west, and Qingpu District of Shanghai in the north.

Located in the core area of the Yangtze River Delta urban agglomeration. The county covers a total area of more than 500 square kilometers, of which the water area accounts for 14.29%. The domestic water network is intertwined and the products are rich. Simple folk customs, known as the land of plenty, the house of silk and the state of culture. According to the data of the seventh census, as of 0: 00 1 1 on June 2020, the resident population of Jiashan County was 648 160. ?

Jiashan County is one of the pilot areas of the second batch of high-quality development and common prosperity demonstration zones in Zhejiang Province. The Master Plan of the Yangtze River Delta Eco-green Integrated Development Demonstration Zone has identified Tang Xi Town and Yaozhuang Town in Jiashan County as the first start-up areas of the integrated demonstration zone.

In 2020, the regional GDP of Jiashan County was 65.577 billion yuan, an increase of 8.0% at comparable prices.

Jiashan County has nine towns (streets), including three streets (Tang Wei Street, Luoxing Street and Huimin Street) and six towns (Tangxi Town, Yaozhuang Town, Dayun Town, Taozhuang Town, Yaogan Town and Tianning Town).

Hangjiahu Plain is located in the northeast of Zhejiang Province, at the junction of Jiangsu, Zhejiang and Shanghai provinces, bordering Qingpu and Jinshan in Shanghai in the east, Lianpinghu and Nanhu in Jiaxing in the south, Xiuzhou in Jiaxing in the west, Wujiang in Suzhou, Jiangsu and Qingpu in Shanghai in the north.

Jiashan is 80km east of Shanghai, 60km from Dahongqiao Business District, 0/00km west of Hangzhou/Kloc, 35km south of Zhapu Port and 80km north of Suzhou, and is in the center of the Yangtze River Delta. The county covers a total area of more than 500 square kilometers.