Graymoor-Devondale is a home rule-class city located in the U.S. state of Kentucky. It is within Jefferson County which a result of Graymoor and Devondale merged. Both derived its name from a local farm. It has a total area of 0.7 square miles at 38°16′24″N 85°37′2″W. The elevation is 587 feet above sea level. As of the 2010 census data, it had a total population of 2,870. The population density was 4,002.9/sq mi.