灵台县在中华人民共和国甘肃省东北部，是平凉市下属的一个县。

位于甘肃省灵台县位于陇东黄土高原南缘，东经107°00'-107°57′，北纬34°54′-35°14′。地势西北高、东南低，海拔在890～1520米之间。面积2038平方公里。与之接壤的县市有：东南边陕西省的长武县、彬县、麟游县、千阳县和陇县，北边泾川县，西边崇信县。

Lingtai County is an administrative district in Gansu, the People's Republic of China. It is one of 58 counties of Gansu. It is part of the Pingliang prefecture, with the city of the same name being the prefecture seat. Its postal code is 744400, and in 1999 its population was 226,576 people.