As of the end of , the number of KOSIC member companies stood at across the Peninsula, which break down to 12 regions and districts nationwide, ie. Busan Metropolitan City (); Changwon (), Tongyeong () and Ulsan () in Gyeongsang-namdo Province; Pohang () in Gyeongsang-bukdo Province; Gangwon-do Province (); Incheon Metropolitan City (); Gyeonggi-do Province (); Chungcheong-namdo Province (); Gunsan () in Jeolla-bukdo Province; Yeosu () and Mokpo () in Jeolla-namdo Province.

• • Incheon ()

  • Gyeonggi ()

• • Chungnam ()

• • Gunsan ()

  • Yeosu ()

  • Mokpo ()

• • Gangwon ()

• • Pohang ()

  • Ulsan ()

  • Busan ()

  • Changwon ()

  • Tongyeong ()

* The figures in parentheses mean the number of KOSIC members in the related regions.