State Road 104 (SR 104) is a part of the Indiana State Road that runs through LaPorte and St. Joseph counties in the US state of Indiana. The 9.51 miles (15.30 km) of SR 104 that lie within Indiana serve as a minor highway. None of the highway is listed on the National Highway System. Most of the route is an rural two-lane highway. The highway passes through residential properties and farmland.