What are the Great Falls, Montana Zip Codes for 2020, 2019Primary Zip Codes for Great FallsZip CodePrimary CitySecondary City59401Great Falls59402Great Falls59403Great Falls59404Great Falls59405Great Falls59406Great FallsCities sharing Zip Codes with Great FallsZip CodePrimary CitySecondary CityMore Information59402Great FallsGreat Falls Great Falls population stats 59402Great FallsMalmstrom Afb Malmstrom Afb population stats Advertisements