A galvanized steel sheet comprising: a steel sheet; and a plating layer on a surface of the steel sheet, wherein the steel sheet includes, as a steel chemical composition, by mass%, C: 0.05 to 0.40%, Si: 0.5 to 3.0%, Mn: 1.5 to 3.0%, P: limited to 0.04% or less, S: limited to 0.01% or less, N: limited to 0.01% or less, Al: limited to 2.0% or less, O: limited to 0.01% or less, and optionally further includes, by mass%, as the steel chemical composition, at least one selected from Mo: 0.01 to 1.0%, Cr: 0.05 to 1.0%, Ni: 0.05 to 1.0%, Cu: 0.05 to 1.0%, Nb: 0.005 to 0.3%, Ti: 0.005 to 0.3%, V: 0.005 to 0.5%, B: 0.0001 to 0.01%, and a total of at least one of elements selected from Ca, Mg, and REM: 0.0005 to 0.04%, and the balance consisting of Fe and unavoidable impurities, wherein a microstructure of the steel sheet includes a ferrite, a bainite, and by volume fraction, 30% or more of a tempered martensite, 8% or more of an austenite, and limited to 10% or less of a pearlite, wherein a total volume fraction of the tempered martensite and the bainite is 40% or more, and an area fraction of grains having a grain size of more than 35 μm occupied per unit area of the microstructure is 10% or less, wherein a tensile strength of the steel sheet is 980 MPa or more, and wherein a plating metal in the plating layer includes, as a plating chemical composition, limited to 15 mass% or less of Fe, limited to 2 mass% or less of Al, and the balance consisting of Zn and unavoidable impurities, the plating layer includes an oxide including at least one chemical element selected from Si, Mn, and Al, and when seen at a cross section including the steel sheet and the plating layer in a thickness direction, a projection area fraction obtained by dividing a length that the oxide is projected onto an interface between the plating layer and the steel sheet by a length of the interface between the plating layer and the steel sheet is 10% or more and a coverage of the plating layer to the steel sheet is 99% or more, and wherein the projection area fraction is an average of values measured at 5 visual fields at a magnification of 10000 times. a steel sheet; and a plating layer on a surface of the steel sheet, wherein the steel sheet includes, as a steel chemical composition, by mass%, C: 0.05 to 0.40%, Si: 0.5 to 3.0%, Mn: 1.5 to 3.0%, P: limited to 0.04% or less, S: limited to 0.01% or less, N: limited to 0.01% or less, Al: limited to 2.0% or less, O: limited to 0.01% or less, and C: 0.05 to 0.40%, Si: 0.5 to 3.0%, Mn: 1.5 to 3.0%, P: limited to 0.04% or less, S: limited to 0.01% or less, N: limited to 0.01% or less, Al: limited to 2.0% or less, O: limited to 0.01% or less, and optionally further includes, by mass%, as the steel chemical composition, at least one selected from Mo: 0.01 to 1.0%, Cr: 0.05 to 1.0%, Ni: 0.05 to 1.0%, Cu: 0.05 to 1.0%, Nb: 0.005 to 0.3%, Ti: 0.005 to 0.3%, V: 0.005 to 0.5%, B: 0.0001 to 0.01%, and a total of at least one of elements selected from Ca, Mg, and REM: 0.0005 to 0.04%, and the balance consisting of Fe and unavoidable impurities, Mo: 0.01 to 1.0%, Cr: 0.05 to 1.0%, Ni: 0.05 to 1.0%, Cu: 0.05 to 1.0%, Nb: 0.005 to 0.3%, Ti: 0.005 to 0.3%, V: 0.005 to 0.5%, B: 0.0001 to 0.01%, and wherein a microstructure of the steel sheet includes a ferrite, a bainite, and by volume fraction, 30% or more of a tempered martensite, 8% or more of an austenite, and limited to 10% or less of a pearlite, wherein a total volume fraction of the tempered martensite and the bainite is 40% or more, and an area fraction of grains having a grain size of more than 35 μm occupied per unit area of the microstructure is 10% or less, wherein a tensile strength of the steel sheet is 980 MPa or more, and wherein a plating metal in the plating layer includes, as a plating chemical composition, limited to 15 mass% or less of Fe, limited to 2 mass% or less of Al, and the balance consisting of Zn and unavoidable impurities, the plating layer includes an oxide including at least one chemical element selected from Si, Mn, and Al, and when seen at a cross section including the steel sheet and the plating layer in a thickness direction, a projection area fraction obtained by dividing a length that the oxide is projected onto an interface between the plating layer and the steel sheet by a length of the interface between the plating layer and the steel sheet is 10% or more and a coverage of the plating layer to the steel sheet is 99% or more, and wherein the projection area fraction is an average of values measured at 5 visual fields at a magnification of 10000 times.