April 1, 2004: Omiya-cho, Mineyama-cho, Amino-cho in Takeno-gun, Tango-cho, Yasaka-cho and Kumihama-cho in Kumano-gun were merged to become Kyotango City by implementing the shisei (grant of city status); as a result, Naka-gun was dissolved.
2004年（平成16年）4月1日大宮町、峰山町、竹野郡網野町、丹後町、弥栄町、熊野郡久美浜町が合併・市制施行し京丹後市となり、中郡消滅。