Missouri State Route 30 is a east-west highway in Southern St. Louis County. It runs from the St. Louis City Limits to the St. Louis/Jefferson County Line. MO St Rt 30 passes through the following towns in St. Louis County. Grantwood Village Sunset Hills
Fenton MO St Rt 30 is not multi-plexed in St. Louis County. MO St Rt 30 intersects the following highways in St. Louis County. Missouri Secondary State Route P, near Wilbur Park.