Missouri State Route 141 is a north-south highway in Northern Jefferson County. This runs from U.S. Rt. 61/67 in Arnold, to the Jefferson/St. Louis County Line, near Fenton. MO St Rt 141 passes through the following town in Jefferson County. Arnold MO St Rt 141 is not multi-plexed in Jefferson County. MO St Rt 141 intersects the following highways in Jefferson County. U.S. Rt. 61, at Arnold. U.S. Rt. 67, at Arnold.
