北齊置永豐郡，治所在懷戎縣（又作懷柔縣，今河北涿鹿縣西南桑乾河南岸保岱鎮），與長寧郡同治一縣，屬於北燕州。北周改北燕州為燕州。隋文帝開皇三年（583年）廢永豐郡、長寧郡。懷戎縣直屬燕州。
參考文獻
- 《中國行政區劃通史·十六國北朝卷》
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