Iowa State Route 1 is the main north-south surface route in Central Washington County. This provides a two-lane alternative to U.S. Rt. 218/IA 27 to the east. IA St Rt 1 passes through the following towns in Washington County. Kalona
Washington Brighton IA St Rt 1 is multi-plexed in Washington County. Iowa State Route 92, near Washington. Iowa State Route 78, from Brighton to the Keokuk/Washington County Line. IA St Rt 1 intersects the following highways in Washington County. Iowa State Route 22, at Kalona.
