遼聖宗太平十年（1030年）平定大延琳，遷寧州民置潤州，治所在海陽縣（今河北省秦皇島市海陽鎮）。屬中京道。來州歸德軍節度使統轄潤州、遷州、隰州。[1]金太祖天輔七年（1123年）被女真奪得。金朝皇統三年（1143年）廢潤州為海陽縣。[2]
註釋
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