This repository contains data on dissolved lead and manganese distributions in the western Bering Sea, collected during the Mu-18 cruise onboard R/V Professor Multanovskiy between August and October 2018. Sampling was carried out along 5 transects (B, C, E, F, and CN lines). Sample collection was carried out using acid-clean Teflon-coated 12 L X-Niskin bottles, which were mounted onto a modified clean conductivity-temperature-depth carousel (Nishioka et al., 2021). The maximum sampling depth was 3000 m. The dissolved fraction was obtained through filtration through a 0.2 μm pore-size capsule filter (Acropak, Pall Industries) immediately after sample collection. Samples were acidified (pH < 2) for storage. Dissolved Mn and Pb concentrations in the samples were analyzed by high resolution inductively coupled plasma mass spectrometry following a pre-concentration step using a NOBIAS PA-1 chelating resin column (Kondo et al., 2016; Wong et al., 2021).