State Road 19 (SR 19) is a route on the Indiana State Highway System that runs between Noblesville and Elkhart in the US state of Indiana. The 143 miles (230.14 km) of Indiana SR 19 serve as a minor highway. Some of the highway is listed on the National Highway System. Various sections are urban four-lane highway and rural two-lane highway. The highway passes through farmland, residential and commercial properties. The northernmost community along the highway is Simonton Lake at the Michigan state line.