Benxi Manchu Autonomous County (; Manchu: ; Möllendorff: bensi manju beye dasangga siyan) is an autonomous county under the administration of the prefecture-level city of Benxi, in the east of Liaoning province, China. It has a total area of , and a population of approximately 300,000 people as of 2002.
The city is home to a sizable Manchu and Hui population.
There is one subdistrict, 10 towns, and one townships within the county:
The only subdistrict is Guanyinge Subdistrict ().
10 towns are: Xiaoshi (), Caohezhang (), Caohecheng (), Caohekou (), Lianshanguan (), Qinghecheng (), Tianshifu (), Nandianzi (), Jianchang (), Pianling (), Gaoguan ().
The only township is Dongyingfang Township ().