Lujiang County (simplified Chinese: 庐江县; traditional Chinese: 廬江縣; pinyin: Lújiāng Xiàn) is a county of Anhui Province, East China, it is under the administration of the prefecture-level city of Hefei, the capital of Anhui.

It is the southernmost county-level division under the jurisdiction of the provincial capital, Hefei.

The government of Lujiang County is located in Lucheng Town.

During the Spring and Autumn period, the Lujiang area was the location of the minor State of Shu (舒) [zh].

Lujiang County used to be administered by the former prefecture-level city of Chaohu until August 2011, when the former Chaohu was dissolved and Lujiang, together with the former Juchao District (now the county-level Chaohu City), became new constituent parts of provincial capital Hefei.