Provided are a high-yield-ratio high-strength galvanized steel sheet that includes a Mn-containing steel sheet serving as a base material and that has high yield strength, good coating appearance, good corrosion resistance, and good exfoliation resistance during severe forming, and a production method therefor. The high-yield-ratio high-strength galvanized steel sheet includes a steel sheet having a specific composition and a metallographic structure including, by area percentage, 20% or less ferrite, 40% or more in total of bainite and tempered martensite, and 60% or less 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, in which the high-yield-ratio high-strength galvanized steel sheet has a yield ratio of 65% or more and a tensile strength of 950 MPa or more.