In 2003, the city of Louisville and Jefferson County governments merged.  Most services consolidated, with the exception of fire protection. Today, 10 remaining fire departments collectively protect 399 square miles and over 770,000 people. 

"Suburban Fire" or the Jefferson County Fire Service consists of 8 individual fire protection districts that are responsible for protecting 333 square miles and over 500,000 people.  Collectively, there are 36 active fire stations.  Over 700 career and part-time personnel staff 23 engines, 10 quints, 3 truck companies, and 29 med units, plus a number of special units.  Additional units are staffed by volunteer firefighters.          

In addition to the Louisville Division of Fire and the suburban fire districts, the city of Shively maintains its own municipal fire department within Jefferson County.  There are also a number of airport, military, and industrial agencies and brigades, as well as several former fire departments that have disbanded, merged, or consolidated.   

In early 2023, the suburban fire districts discontinued their longstanding four-digit numbering system with the implementation of a new Louisville MetroSafe (911) CAD system and fell in line sequentially behind Louisville and Shively with a two-digit matrix for frontline fire units (by station number) and three digits for auxiliary units, support units, and med units. In Jefferson County, reserve apparatus are called "auxiliary" apparatus.  Med Units with a prefix of 1 are ALS, 2 are Advanced BLS, 3 are BLS, and 4 are ALS Fly Car.   

Pages have been reorganized by station number of existing agencies, followed by former agencies and legacy pages.  Updated photos will be added as units are physically renumbered.