378th Avenue in Palmyra Township, South Dakota

378th Avenue in Brown County is a two-lane, unpaved unclassified road. It runs in a north-south direction and crosses 101st Street, 102nd Street, 103rd Street, 106th Street and 380th Avenue and ends at 109th Street, while the other end is a cul-de-sac. It connects Allison Township and Palmyra Township. 378th Avenue also exists in Highland Township, New Hope Township, Mercier Township and Franklyn Township.