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In page Mockingbird Valley, Kentucky:

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Mockingbird Valley is a home rule-class city in Jefferson County, Kentucky, United States.[1] Since incorporation, there has been some interest in making it a historic preservation district, largely to prevent unwanted development. As of the 2020 census, Mockingbird Valley had a population of 175.[4] It has the highest per capita income of any location in Kentucky and the tenth-highest of any location in the United States.[citation needed]