Gallatin Gateway, MT is a city located in Gallatin County, Montana and has a land area of 686.09 square miles (1,776.97 km2). The water area for the city is 1.94 square miles or 5.02 km2. There is one unique zip code in Gallatin Gateway, Montana and it is 59730. The area code(s) for Gallatin Gateway is 406.
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