Gu'an County (Chinese: 固安县; pinyin: Gù'ān Xiàn) is a county of Hebei province, China, bordering Beijing to the north.

It is under the jurisdiction of Langfang City, with direct access to central Beijing via both G45 Daqing–Guangzhou Expressway and China National Highway 106.

The area is also served by Gu'an railway station and Gu'an East railway station.

The county administers five towns and four townships.

This Langfang location article is a stub.