Erlanger is a home rule-class city in Kenton County, Kentucky, United States. It had a 2010 census population of 18,368. Erlanger is part of the Cincinnati-Middletown, OH-KY-IN Metropolitan Statistical Area.
Erlanger was founded in the 1880s. The city was named after the Parisian family bank Emile Erlanger & Co. and its founder, Baron Frédéric Émile d'Erlanger, who helped finance the town's early development. In current usage, the name is pronounced in an anglicized way, with neither a French nor German accent. Nearby Elsmere was originally known as "South Erlanger".
Erlanger is located at 39°0′49″N 84°35′39″W (39.013511, -84.594042).
According to the United States Census Bureau, the city has a total area of 8.4 square miles (22 km2), of which 8.3 square miles (21 km2) is land and 0.1 square miles (0.26 km2) (1.19%) is water.
As of the 2000 census, there were 16,676 people, 6,597 households, and 4,406 families living in the city.