汉献帝建安年间分张掖郡置[1]，治所在日勒县（北魏改名永宁县，今甘肃省永昌县西北）。属凉州。辖境约当今甘肃省永昌县西部及山丹县一带。领日勒、骊靬、番和3县[2]。西魏废。十六国时北凉沮渠蒙逊攻南凉，数战于此。
参考文献
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