A high-yield-ratio high-strength galvanized steel sheet comprising: a steel sheet including: a composition containing, on a percent by mass basis: C: 0.12% or more and 0.25% or less; Si: less than 1.0%; Mn: 2.0% or more and 3% or less; P: 0.05% or less; S: 0.005% or less; Al: 0.1% or less; N: 0.008% or less; Ca: 0.0003% or less; 0.01% to 0.1% in total of one or more of Ti, Nb, V, and Zr, optionally 0.1% to 0.5% in total of one or more of Mo, Cr, Cu, and Ni, and/or B: 0.0003% to 0.005%, and Sb: 0.001% to 0.05%, the balance being Fe and unavoidable impurities, and a metallographic structure containing, by area percentage, 20% or less of ferrite, 40% or more in total of bainite and tempered martensite, and 60% or less of as-quenched martensite, the bainite having an average grain size of 6.0 μm or less; and a coated layer arranged on the steel sheet, the coated layer having a coating weight per side of 20 to 120 g/m 2 and having a Mn content of 0.05 g/m 2 or less; and a yield ratio of 65% or more and a tensile strength of 950 MPa or more. a steel sheet including: a composition containing, on a percent by mass basis: C: 0.12% or more and 0.25% or less; Si: less than 1.0%; Mn: 2.0% or more and 3% or less; P: 0.05% or less; S: 0.005% or less; Al: 0.1% or less; N: 0.008% or less; Ca: 0.0003% or less; 0.01% to 0.1% in total of one or more of Ti, Nb, V, and Zr, optionally 0.1% to 0.5% in total of one or more of Mo, Cr, Cu, and Ni, and/or B: 0.0003% to 0.005%, and Sb: 0.001% to 0.05%, the balance being Fe and unavoidable impurities, and a metallographic structure containing, by area percentage, 20% or less of ferrite, 40% or more in total of bainite and tempered martensite, and 60% or less of as-quenched martensite, the bainite having an average grain size of 6.0 μm or less; and a coated layer arranged on the steel sheet, the coated layer having a coating weight per side of 20 to 120 g/m 2 and having a Mn content of 0.05 g/m 2 or less; and a yield ratio of 65% or more and a tensile strength of 950 MPa or more. a composition containing, on a percent by mass basis: C: 0.12% or more and 0.25% or less; Si: less than 1.0%; Mn: 2.0% or more and 3% or less; P: 0.05% or less; S: 0.005% or less; Al: 0.1% or less; N: 0.008% or less; Ca: 0.0003% or less; 0.01% to 0.1% in total of one or more of Ti, Nb, V, and Zr, C: 0.12% or more and 0.25% or less; Si: less than 1.0%; Mn: 2.0% or more and 3% or less; P: 0.05% or less; S: 0.005% or less; Al: 0.1% or less; N: 0.008% or less; Ca: 0.0003% or less; 0.01% to 0.1% in total of one or more of Ti, Nb, V, and Zr, optionally 0.1% to 0.5% in total of one or more of Mo, Cr, Cu, and Ni, and/or B: 0.0003% to 0.005%, and Sb: 0.001% to 0.05%, the balance being Fe and unavoidable impurities, and 0.1% to 0.5% in total of one or more of Mo, Cr, Cu, and Ni, and/or B: 0.0003% to 0.005%, and Sb: 0.001% to 0.05%, the balance being Fe and unavoidable impurities, and a metallographic structure containing, by area percentage, 20% or less of ferrite, 40% or more in total of bainite and tempered martensite, and 60% or less of as-quenched martensite, the bainite having an average grain size of 6.0 μm or less; and a coated layer arranged on the steel sheet, the coated layer having a coating weight per side of 20 to 120 g/m 2 and having a Mn content of 0.05 g/m 2 or less; and a yield ratio of 65% or more and a tensile strength of 950 MPa or more.