Gamak Bay, Deukryang Bay, and Doam Bay were designated as Environmental preservation sea areas for conservation of fishery resources by the Korean government. It is essential to maintain the chemical status of these environments, particularly for heavy metals that pose potential risks to fishery resources. This study was, therefore, carried out to investigate the concentration distribution and potential risk of seven heavy metals, namely Cd, Cr, Cu, Zn, Pb, As, and Hg present in the surface sediments (n = 116) of these sea areas during March and August 2009. The metal concentrations in the sampling sites was found to be highly variable. The dominant metals were Zn (mean = 118.22 mg/kg) for Gamak Bay, Cr (mean = 19.07 mg/kg) for Dyukryang Bay, and Zn (mean = 39.07 mg/kg) for Doam Bay. Overall, the order of the target metals was Zn > Cr > Pb > Cu > As > Hg > Cd. Additionally, the metal concentrations were categorized as less than Igeo Class 2 ‘Moderately polluted’; except for As determined during March in Gamak Bay. As had concentrations that categorized it under Igeo Class 3 ‘Moderately/strongly polluted’.