Dataset contains geochemistry data from the Romanian inner shelf waters (bottom depths between 15 m and 67 m), in July-August 2022. Data were collected on board R/V Mare Nigrum, during a cruise conducted within the national project "Multidisciplinary research to improve knowledge of the climate change and human pressure interaction and its effects on the Black Sea ecosystem" – PN 19 20 01 02. Twenty-one stations distributed along 4 main transects (Sf. Gheorghe-SE, Portita-SE, Constanta-SE, and Mangalia-E) were performed for sediment investigations by the GeoEcoMar team. Sediment samples were collected using Van Veen grab sampler and Multicorer MARK II-400 and analyzed for major and minor components as well as trace elements (by X ray fluorescence) in the GeoEcoMar lab.