 Until sometime in the 2010s, SR 19 shared a one block concurrency with westbound Former SR 42 in downtown Altoona.State Road 19 has two county suffixed routes, both of which are in Lake County

County Road 19A is a county suffixed alternate route of State Road 19 between Tavares and western Mount Dora in Lake County in Florida, although neither of the termini is SR 19.The road begins at County Road Old 441, as Dora Avenue, which also runs south as a city street to County Road 452.