Engine 66 was organized March 1, 1927 at Eva and Dearnley Streets in the Roxborough section of the city. The building housing the company was a schoolhouse that was converted to a firehouse. The company was one of four engines organized during 1927 and 1928 with a hose and chemical wagon only. In the event they had a fire requiring a hose line larger than a chemical line, these companies would place a hydrant stream in service. The intent was to purchase engine apparatus for these companies during 1929. Unfortunately, the Great Depression delayed those purchases. Engine 66 was assigned a 1923 American LaFrance 900 GPM pumper during 1932. During 1951 Engine 66 moved to a new firehouse at Ridge and Shawmont Avenues where they continue to serve the Roxborough neighborhood.