State Highway 3 (SH-3) is a state highway in northern Idaho, connecting U.S. Route 12 near Spalding, east of Lewiston, with Interstate 90 near , east of Coeur d'Alene. It is 117.68 miles (189.4 km) in length and runs north–south, east of and generally parallel to Idaho's primary north–south highway, U.S. Route 95.