Willowick is a city in Lake County, Ohio, United States, on Lake Erie. The population was 14,204 at the 2020 census. A suburb of Cleveland, Willowick is served by a branch of the Willoughby-Eastlake Public Library. The city's name is a portmanteau of two adjacent cities, Willoughby and Wickliffe. As of 2022, the mayor of Willowick is Michael Vanni.

Lake County is a county in the U.S. state of Ohio. As of the 2020 census, the population was 232,603. Its county seat is Painesville, and its largest city is Mentor.