The Urban Neighborhoods (shaded orange) lie within the Louisville city boundary that predated the city-county merger – an area often referred to as "The Urban Services District".

Urban Neighborhood names and boundaries are based on a federal urban neighborhood mapping grant from the late 1970's. Many of these boundaries are still used for grants.

The Municipalities (shaded purple) represent smaller cities within Louisville. Before the city-county merger, these municipalities were independent governmental entities. Today, they share governmental authority with Louisville Metro through defined interlocal agreements.

The Designated Places (shaded green) lie outside of the former Louisville city boundary. Historically, before the city-county merger, these were densely settled concentrations of population that were not within an incorporated boundary but were identified locally by a name. Today, they are part of Louisville Metro.