Jiashan County () is a county in the north of Zhejiang Province, bordering Shanghai to the northeast and Jiangsu province to the north. It is administered by the prefecture-level city of Jiaxing. Jiashan is nicknamed "The Land of Fish and Rice", and is southwest of central Shanghai, east of Hangzhou, and south of Suzhou. The county seat is located on 126 People Avenue, Weitang Town. The second campus of Sanda University, known as Guangbiao Institute, is in Jiashan County.