Live Chat I-80 Community Nearby Traffic Johnston Post Office (Amenity postoffice) 2024-05-22 Roadnow Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to Johnston Post Office (Amenity Postoffice) Urbandale, IA 4.94 Grimes, IA 6.23 Des Moines, IA 6.57 Interstate highway exits close to Johnston Post Office (Amenity Postoffice) Exit 129, i80 2.91 Exit 129, i35 2.92 Exit 131, i80 3.01 Interstate highways close to Johnston Post Office (Amenity Postoffice) i80 map 2.91 i35 map 2.92 i680ne map 156.58 State roads close to Johnston Post Office (Amenity Postoffice) IA 28 map 3.01 IA COUNTY R6F map 3.28 IA 141 map 4.70