Volatile chlorinated hydrocarbons (VCHCs), key ozone-depleting substances and greenhouse gases, depend on oceanic emission and uptake for their atmospheric budget. However, data on VCHCs in the Western Pacific <span>remain limited</span>. This study investigated the distribution and sources of VCHCs (CHCl₃, C₂HCl₃, CCl₄, and CH₃CCl₃) in the Western Pacific during 2019&ndash;2020. Elevated seawater concentrations of CHCl₃ and C₂HCl₃ in the Kuroshio-Oyashio Extension (KOE) were driven by mesoscale eddies enhancing primary productivity, while CCl₄ and CH₃CCl₃ concentrations were mainly influenced by atmospheric inputs. Atmospheric concentrations of VCHCs decreased from coastal to open ocean areas, with terrestrial air masses from Eastern Asia contributing significantly. Additionally, atmospheric CHCl₃ and C₂HCl₃ concentrations were positively correlated with Chl-<em>a</em> in the KOE region. These findings suggested that both atmospheric transport from the continent and ocean emissions could influence CHCl₃ and C₂HCl₃ levels. However, analysis of sea-to-air fluxes and saturation anomalies showed that atmospheric transport primarily influenced atmospheric CHCl₃ and C₂HCl₃ concentrations. The estimated sea-to-air flux indicated that the Western Pacific acted as a source for CHCl₃ and C₂HCl₃ but a sink for CCl₄ and CH₃CCl₃, with the potential to absorb 17 &plusmn; 2 % of CCl₄ emissions from Eastern China, 7 &plusmn; 5 % from Eastern Asia, and 3 &plusmn; 1 % of global emissions. Additionally, this region accounted for 8 &plusmn; 4 % of the global oceanic absorption of CCl₄. These findings underscored the Western Pacific&rsquo;s key role in regulating atmospheric CCl₄ concentrations and mitigating its accumulation in Eastern Asia, providing essential data for global VCHCs emission and uptake estimates.