Government in Garnavillo, IA Garnavillo City Hall106 E Chestnut StGarnavillo, IA, 520495639642331City HallCity OfGovernment City Village TownshipPolice DepartmentPolice DepartmentsSheriff Department Garnavillo City Shop208 W Chestnut StGarnavillo, IA, 520495639642809City OfGovernment City Village Township Show MoreSee AlsoCity, Village & Township Government