Jingtai County (Chinese: 景泰县; pinyin: Jǐngtài Xiàn) is a county in the middle of Gansu Province, bordering Inner Mongolia to the north. It is under the administration of Baiyin City and located at its northwest end. Covering an area of 5,483 square kilometres (2,117 sq mi), it governs 8 towns and 3 townships, which then in turn govern 15 residential communities and 135 administrative villages. Its postal code is 730400, and its population as of the 2010 Chinese Census was 225,755 people, which the county government reports has grown to about 238,900 as of 2019.