Hardwick is a city in Rock County, Minnesota, United States. The population was 189 as of the 2020 census. As of 2018, stray cats outnumbered human residents of the city. Hardwick was platted in 1892, and named after J. L. Hardwick, a railroad official. A post office has been in operation at Hardwick since 1891. Hardwick was incorporated in 1898.