A high-strength galvanized steel sheet comprising: a steel sheet having a steel composition having a component composition containing, in mass%, C: more than or equal to 0.10% and less than or equal to 0.30%, Si: less than 1.2%, Mn: more than or equal to 2.0% and less than or equal to 3.5%, P: less than or equal to 0.010%, S: less than or equal to 0.002%, Al: less than or equal to 1%, N: less than or equal to 0.006%, optionally, at least one selected from, in mass%, one or more of Ti, Nb, V, and Zr: 0.005 to 0.1% in total, one or more of Mo, Cr, Cu, and Ni: 0.005 to 0.5% in total, and B: 0.0003 to 0.005%, any one or two selected from Sb: 0.001 to 0.1% and Sn: 0.001 to 0.1%, and Ca: less than or equal to 0.0010%, and the balance being Fe and unavoidable impurities, and a steel structure containing martensite and bainite at more than or equal to 70%, including 100%, ferrite at less than 20%, including 0%, and retained austenite at less than 5%, including 0%, in terms of area ratio, an amount of diffusible hydrogen in steel being less than or equal to 0.20 mass ppm; and a galvanizing layer provided on a surface of the steel sheet, having a content amount of Fe of 8 to 15% in mass%, Al in an amount of 0.001 to 1.0 mass%, optionally one or two or more selected from Pb, Sb, Si, Sn, Mg, Mn, Ni, Cr, Co, Ca, Cu, Li, Ti, Be, Bi, and the REMs at 0 to 30% in total, in mass%, and the balance being Zn and unavoidable impurities, and having a coating weight per one surface of 20 to 120 g/m 2, wherein an amount of Mn oxides contained in the galvanizing layer is less than or equal to 0.050 g/m 2, and a tensile strength is more than or equal to 1100 MPa and a yield ratio is more than or equal to 0.85, where the steel structure, the amount of diffusible hydrogen, the amount of Mn oxides contained in the galvanizing layer, the tensile strength and the yield ratio are determined utilizing the methods described in the description. a steel sheet having a steel composition having a component composition containing, in mass%, C: more than or equal to 0.10% and less than or equal to 0.30%, Si: less than 1.2%, Mn: more than or equal to 2.0% and less than or equal to 3.5%, P: less than or equal to 0.010%, S: less than or equal to 0.002%, Al: less than or equal to 1%, N: less than or equal to 0.006%, optionally, at least one selected from, in mass%, one or more of Ti, Nb, V, and Zr: 0.005 to 0.1% in total, one or more of Mo, Cr, Cu, and Ni: 0.005 to 0.5% in total, and B: 0.0003 to 0.005%, any one or two selected from Sb: 0.001 to 0.1% and Sn: 0.001 to 0.1%, and Ca: less than or equal to 0.0010%, and the balance being Fe and unavoidable impurities, and a steel structure containing martensite and bainite at more than or equal to 70%, including 100%, ferrite at less than 20%, including 0%, and retained austenite at less than 5%, including 0%, in terms of area ratio, an amount of diffusible hydrogen in steel being less than or equal to 0.20 mass ppm; and a galvanizing layer provided on a surface of the steel sheet, having a content amount of Fe of 8 to 15% in mass%, Al in an amount of 0.001 to 1.0 mass%, optionally one or two or more selected from Pb, Sb, Si, Sn, Mg, Mn, Ni, Cr, Co, Ca, Cu, Li, Ti, Be, Bi, and the REMs at 0 to 30% in total, in mass%, and the balance being Zn and unavoidable impurities, and having a coating weight per one surface of 20 to 120 g/m 2, wherein an amount of Mn oxides contained in the galvanizing layer is less than or equal to 0.050 g/m 2, and a tensile strength is more than or equal to 1100 MPa and a yield ratio is more than or equal to 0.85, where the steel structure, the amount of diffusible hydrogen, the amount of Mn oxides contained in the galvanizing layer, the tensile strength and the yield ratio are determined utilizing the methods described in the description.