Gangu County (Chinese: 甘谷县; pinyin: Gāngǔ Xiàn) is a county in the southeast of Gansu province, China.

It is under the administration of Tianshui City and is the most populous county in Gansu.

[4][5] Gangu was a stop on the Silk Road, as a tea and horse market, and as a stopover for traders.

[7][8] Local culture includes Wushu martial arts and the sculpturing of animal ornaments on traditional Chinese roofs.

[1][9] Gangu County is divided to 13 towns and 2 townships.