Masan Regional Office of Oceans and Fisheries
- 1899's May 1Opening as Masan Port
- 1945's November 1Bureau of Masan Pier established under the Ministry of Transportation
- 1949's February 15Bureau of Masan Marine Affairs established under the Ministry of Transportation
- 1955's December 12Masan District Office established under the Busan Regional Office of Marine Affairs
- 1961's October 2Masan District Office of Busan Regional Office of Marine Affairs established under the Department of Transportation
- 1970's February 13Masan Regional Office of Marine Affairs established under the Ministry of Transportation
- 1976‘s March 15Masan Regional Office of Port Administration established under the Ministry of Port Administration
- 1977's December 16Masan Regional Maritime and Port Administration established under the Korea Maritime and Port Administration
- 1996's August 8Masan Regional Maritime and Port Administration under the Ministry of Maritime Affairs and Fisheries
- 1997's May 24Masan Regional Office of Maritime Affairs and Fisheries established under the Ministry of Maritime Affairs and Fisheries
- 2002's March 9Goseong Office of Fishery Technology Management established under the Masan Regional Office of Marine Affairs Ocean
- 2008's February 9Masan Regional Maritime Affairs and Port Administration established under the Ministry of Land, Transport and Maritime Affairs (6 departments and 3 local offices)
- 2009's December 31Masan Regional Maritime Affairs and Port Administration reorganized with (6 departments, 1 office and 2 branches) under the Ministry of Land, Transport and Maritime Affairs
- 2013's March 23Masan Regional Ocean and Port Administration reorganized with 6 departments, 1 office and 2 branches under the Ministry of Ocean and Fisheries
- 2015's January 8Masan Regional Ocean and Fisheries reorganized with 7 departments, 1 office and 1 branch under the Ministry of Ocean and Fisheries
