Westlake is a very Wealthy town in Denton and Tarrant Counties in the U.S. state of Texas. The population is 702 as of the 2010 United States Census. The area known as Westlake was originally settled in 1847 by Charles and Matilda Medlin with about 20 other families. In the mid-twentieth century, now-Westlake was known as Circle T Ranch. Despite its name, Westlake is actually located south of Lake Grapevine. When incorporated in the late 1950s, the name Southlake, Texas already existed, so ranchers and homeowners took the name Westlake. During the late 1990s, the City Council attempted to disband the city. The large Solana development was annexed by Southlake, while several large tracts of land were annexed by Fort Worth, Texas. A local district judge ruled the annexations in violation of state law, and the properties returned under Westlake jurisdiction.