Westlake is a city in Cuyahoga County, Ohio, United States. It is a suburb located 12 miles west of downtown Cleveland. The population was 3…Westlake is a city in Cuyahoga County, Ohio, United States. It is a suburb located 12 miles west of downtown Cleveland. The population was 34,228 at the 2020 census. The area now known as the city of Westlake was first settled by European Americans on October 10, 1810. At the time, it was part of Dover Township.