Missouri State Route 19 is a north-south highway in Eastern Audrain County. It runs from the Audrain/Montgomery County Line, near Martinsburg, to the Audrain/Ralls County Line, near Laddonia. MO St Rt 19 passes through the following towns in Audrain County. Martinsburg Laddonia
MO St Rt 19 is multi-plexed in Audrain County. U.S. Rt. 54, from near Martinsburg to near Laddonia.
MO St Rt 19 intersects the following highways in Audrain County. Missouri Secondary State Route N, at Martinsburg. Missouri Secondary State Route U, at Martinsburg. Missouri Secondary State Route BB, near Martinsburg. U.S. Rt. 54, near Martinsburg. Missouri Secondary State Route K, at Laddonia. Missouri Secondary State Route KK, at Laddonia.
