Yūki (結城市, Yūki-shi) is a city located in Ibaraki Prefecture, Japan. As of 1 October 2020, the city had an estimated population of 50,282 in 19,353 households and a population density of 765 persons per km2. The percentage of the population aged over 65 was 30.8%. The total area of the town is 65.76 square kilometres (25.39 sq mi). Yūki is famous for its production of yūki-tsumugi, a traditional fabric production technique which is an Important Intangible Cultural Property, and the city has a rich religious history, with many older Buddhist temples and Shinto shrines.