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Trace elements are pollutants of both natural and anthropogenic origin which can influence negatively on ecosystem and wildlife health. We evaluated trace element in blood samples of gray seal (Halichoerus grypus) stranded in the Gulf of Riga and their influence on their health status through hematological and biochemical profiles. Zn showed the highest levels followed by Cu > Se > Pb > THg > As. Cr and Cd were not detected. Most trace element levels were generally comparable to those reported in seal species; however, high Pb values were observed in those sample showing detectable concentrations (<0.046–257.6 μg/kg ww). Significant positive correlations were found between trace elements concentrations and various biochemical parameters, including Se-ASAT, Se:Hg-ASAT, Cu-TP, Cu-ALB, Cu Ca, Zn-ALAT, ZN-LDH, Zn P, Zn-Segment neutrophils, and Pb-CK. Nevertheless, most relationships were not strong enough (p > 0.04) to assume a toxicological implication. Despite its limitations, this information could serve as the baseline for future research. [Display omitted] • Trace elements were measured in blood of gray seals from Gulf of Riga. • Hematological and serum chemistry analysis were determinated. • Trace element levels were comparable to others reported in seal species, but lead was high. • Alanine-Aminotransferase, ALAT; Aspartate-Aminotransferase, ASAT; Gamma-Glutamyl Transferase, GGT; Lactate Dehydrogenase, LDH; Creatine Kinase, CK; White Blood Cells, WBC and Neutrophil levels were increased. • Blood parameters and some trace elements were correlated but not to assume a toxicological implication. [ABSTRACT FROM AUTHOR]