This dataset extends the one published by Couture et al. (2018) (doi:10.1594/PANGAEA.884689) with mercury (Hg) content and additional geomorphological parameters derived from other studies. The main objectives were to quantify Hg stocks and to estimate Hg release from coastal erosion along the Yukon coast, based on sediment Hg concentrations and coastal erosion rates. To accomplish this, the coastal segmentation by Couture et al. (2018) was used. They divided the study area into 44 terrain units, each consisting of several uniform layers of varying thickness (508 layers in total). Since multiple measurements existed for some of those layers, their dataset comprised 586 entries, which we summarized here into 508 entries. We used this dataset as a basis and augmented it with own TOC and Hg measurements. Where TOC measurements were available from our samples, we used the mean of our values and those reported by Couture et al. (2018). Hg values originated from own measurements, either from samples taken during the Yukon Coast 2024 expedition (YC24) (see Jaspers & Fritz, 2026, doi:10.1594/PANGAEA.987057) or from the Alfred Wegener Institute (AWI) archive, as well as from data provided by Juliane Wolter. When multiple measurements were available for the same layer, the values were averaged.