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".
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 Suburban Fire Districts (shaded green) lie outside of the former Louisville city boundary. The districts correspond to the county's suburban population centers. Some districts coincide with established municipalities (e.g. Anchorage, Shively), while others align with unincorporated places (e.g. Fairdale, Fern Creek).