Hitachiōmiya is a city located in Ibaraki Prefecture, Japan. As of 1 July 2020, the city had an estimated population of 39,281 in 16.047 households and a population density of 220 persons per km2. The percentage of the population aged over 65 was 37.6%. The total area of the city is 348.45 square kilometres (134.54 sq mi).