Route nationale 56, RN56 or N56, is a 26 km long former route nationale (national road) linking Macheren to Sarralbe in the Grand-Est region of France. Reforms in 2004[1] transferred responsibility for its maintenance to the department of Moselle. Losing its national route status, the road was renumbered D 656. Its terminuses are the D 603 near Macheren to the northwest, and the D 661 near Sarralbe in the southeast.
Towns along the route include: