Gaotai County (Chinese: 高台县; pinyin: Gāotái Xiàn) is a county in Gansu Province, China, bordering Inner Mongolia to the northeast.

It is under the administration of the prefecture-level city of Zhangye.

Its postal code is 734300, and in 1999 its population was 155,260 people.

Gaotai County is divided to 9 towns and 1 other.

This Gansu location article is a stub.