信州，彰信軍，一作彰聖軍，節度州，兵事屬黃龍府都部署司，契丹天復三年（903年）九月，耶律阿保機復攻下河東、懷遠等軍，懷遠，以渤海國懷遠府得名。開泰初年設置信州，治在武昌縣，今吉林省公主嶺市西北，下轄武昌縣、定武縣。金朝信州領武昌縣。元朝初年，廢除。
行政區劃
參考文獻
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