Karimun district, later were abolished based on the decree of governor, head of the level I region of Riau dated August 9, 1964 no. Up/247/5/1965. Based on such stipulation, as of January 1, 1966, all administrative territory of the district in the Riau Islands regency was abolished. It is written the history that in glory of Riau Lingga kingdom when it took over the famous Johor kingdom, most parts of Riau islands territory were in the authority of kingdom of Riau Lingga. It is mentioned that the glorious time of Riau can be depicted by the incoming flow of international commerce since there were so many foreign traders lived in Bandar Riau. Furthermore, it was explained also about the prosperity of this Riau territory, especially at the time his young majesty King Ali held the power. Riau had experienced rapid development. Such historical meanings had implicated the economic situation in this territory nowadays.
Along with the spirit of regional autonomy, then on October 12 law no. 53, 1999 was stipulated which stated that Karimun regency together with kundur and moro regency were merged to one regency with the name of Karimun regency, with position at the same level with other regencies in Indonesia.