Provided is a zirconia powder that has excellent moldability and a high sintered density, and that can produce a zirconia sintered product in a simple manner; also provided is a method for producing the zirconia powder. The zirconia powder according to the present invention comprises 2 to 6 mol % of yttria, has a volume of pores with a pore diameter of 200 nm or less of 0.14 to 0.28 mL/g, and has a relative molding density of 44 to 55% when the zirconia powder is molded at a molding pressure of 1 t/cm2, wherein the relative molding density is represented by the following formula (1): relative molding density (%)=(molding density/theoretical sintered density)×100  (1).