Array of Montana Zip Code => County (updated 05/2019)

montana-zip-counties

$montana_zip_counties = [
    "59001" => "Stillwater",
    "59002" => "Yellowstone",
    "59003" => "Rosebud",
    "59004" => "Rosebud",
    "59006" => "Yellowstone",
    "59007" => "Carbon",
    "59008" => "Carbon",
    "59010" => "Treasure",
    "59011" => "Sweet Grass",
    "59012" => "Rosebud",
    "59013" => "Carbon",
    "59014" => "Carbon",
    "59015" => "Yellowstone",
    "59016" => "Big Horn",
    "59018" => "Park",
    "59019" => "Stillwater",
    "59020" => "Park",
    "59022" => "Big Horn",
    "59024" => "Yellowstone",
    "59025" => "Big Horn",
    "59026" => "Carbon",
    "59027" => "Park",
    "59028" => "Stillwater",
    "59029" => "Carbon",
    "59030" => "Park",
    "59031" => "Big Horn",
    "59032" => "Fergus",
    "59033" => "Sweet Grass",
    "59034" => "Big Horn",
    "59035" => "Big Horn",
    "59036" => "Wheatland",
    "59037" => "Yellowstone",
    "59038" => "Treasure",
    "59039" => "Rosebud",
    "59041" => "Carbon",
    "59043" => "Rosebud",
    "59044" => "Yellowstone",
    "59046" => "Valley",
    "59047" => "Park",
    "59050" => "Big Horn",
    "59052" => "Sweet Grass",
    "59053" => "Meagher",
    "59054" => "Musselshell",
    "59055" => "Sweet Grass",
    "59057" => "Yellowstone",
    "59058" => "Garfield",
    "59059" => "Musselshell",
    "59061" => "Stillwater",
    "59062" => "Powder River",
    "59063" => "Stillwater",
    "59064" => "Yellowstone",
    "59065" => "Park",
    "59066" => "Big Horn",
    "59067" => "Stillwater",
    "59068" => "Carbon",
    "59069" => "Stillwater",
    "59070" => "Carbon",
    "59071" => "Carbon",
    "59072" => "Musselshell",
    "59073" => "Musselshell",
    "59074" => "Valley",
    "59075" => "Big Horn",
    "59076" => "Treasure",
    "59077" => "Garfield",
    "59078" => "Wheatland",
    "59079" => "Yellowstone",
    "59081" => "Park",
    "59082" => "Park",
    "59083" => "Rosebud",
    "59084" => "Petroleum",
    "59085" => "Wheatland",
    "59086" => "Park",
    "59087" => "Petroleum",
    "59088" => "Yellowstone",
    "59089" => "Big Horn",
    "59101" => "Yellowstone",
    "59102" => "Yellowstone",
    "59103" => "Yellowstone",
    "59104" => "Yellowstone",
    "59105" => "Yellowstone",
    "59106" => "Yellowstone",
    "59107" => "Yellowstone",
    "59108" => "Yellowstone",
    "59111" => "Yellowstone",
    "59112" => "Yellowstone",
    "59114" => "Yellowstone",
    "59115" => "Yellowstone",
    "59116" => "Yellowstone",
    "59117" => "Yellowstone",
    "59201" => "McCone",
    "59211" => "Sheridan",
    "59212" => "Roosevelt",
    "59213" => "Richland",
    "59214" => "McCone",
    "59215" => "McCone",
    "59217" => "Richland",
    "59218" => "Roosevelt",
    "59219" => "Sheridan",
    "59221" => "Richland",
    "59222" => "Daniels",
    "59223" => "Valley",
    "59225" => "Valley",
    "59226" => "Roosevelt",
    "59230" => "Valley",
    "59231" => "Valley",
    "59240" => "Valley",
    "59241" => "Valley",
    "59242" => "Sheridan",
    "59243" => "Richland",
    "59244" => "Valley",
    "59247" => "Sheridan",
    "59248" => "Valley",
    "59250" => "Valley",
    "59252" => "Sheridan",
    "59253" => "Daniels",
    "59254" => "Sheridan",
    "59255" => "Richland",
    "59256" => "Sheridan",
    "59257" => "Sheridan",
    "59258" => "Sheridan",
    "59259" => "Dawson",
    "59260" => "Valley",
    "59261" => "Phillips",
    "59262" => "Richland",
    "59263" => "Daniels",
    "59270" => "Richland",
    "59273" => "Valley",
    "59274" => "McCone",
    "59275" => "Sheridan",
    "59276" => "Daniels",
    "59301" => "Custer",
    "59311" => "Carter",
    "59312" => "Garfield",
    "59313" => "Fallon",
    "59314" => "Powder River",
    "59315" => "Dawson",
    "59316" => "Carter",
    "59317" => "Powder River",
    "59318" => "Garfield",
    "59319" => "Carter",
    "59322" => "Garfield",
    "59323" => "Rosebud",
    "59324" => "Carter",
    "59326" => "Prairie",
    "59327" => "Rosebud",
    "59330" => "Dawson",
    "59332" => "Carter",
    "59333" => "Rosebud",
    "59336" => "Custer",
    "59337" => "Garfield",
    "59338" => "Custer",
    "59339" => "Dawson",
    "59341" => "Prairie",
    "59343" => "Powder River",
    "59344" => "Fallon",
    "59345" => "Powder River",
    "59347" => "Rosebud",
    "59349" => "Prairie",
    "59351" => "Powder River",
    "59353" => "Wibaux",
    "59354" => "Fallon",
    "59401" => "Cascade",
    "59402" => "Cascade",
    "59403" => "Cascade",
    "59404" => "Cascade",
    "59405" => "Cascade",
    "59406" => "Cascade",
    "59410" => "Lewis and Clark",
    "59411" => "Glacier",
    "59412" => "Cascade",
    "59414" => "Cascade",
    "59416" => "Pondera",
    "59417" => "Glacier",
    "59418" => "Judith Basin",
    "59419" => "Teton",
    "59420" => "Chouteau",
    "59421" => "Cascade",
    "59422" => "Teton",
    "59424" => "Fergus",
    "59425" => "Pondera",
    "59427" => "Glacier",
    "59430" => "Fergus",
    "59432" => "Pondera",
    "59433" => "Teton",
    "59434" => "Glacier",
    "59435" => "Toole",
    "59436" => "Teton",
    "59440" => "Chouteau",
    "59441" => "Fergus",
    "59442" => "Chouteau",
    "59443" => "Cascade",
    "59444" => "Liberty",
    "59446" => "Chouteau",
    "59447" => "Judith Basin",
    "59448" => "Pondera",
    "59450" => "Chouteau",
    "59451" => "Fergus",
    "59452" => "Judith Basin",
    "59453" => "Wheatland",
    "59454" => "Toole",
    "59456" => "Toole",
    "59457" => "Fergus",
    "59460" => "Chouteau",
    "59461" => "Liberty",
    "59462" => "Judith Basin",
    "59463" => "Cascade",
    "59464" => "Fergus",
    "59465" => "Cascade",
    "59466" => "Toole",
    "59467" => "Teton",
    "59468" => "Teton",
    "59469" => "Judith Basin",
    "59471" => "Fergus",
    "59472" => "Cascade",
    "59474" => "Toole",
    "59477" => "Cascade",
    "59479" => "Judith Basin",
    "59480" => "Cascade",
    "59482" => "Toole",
    "59483" => "Cascade",
    "59484" => "Toole",
    "59485" => "Cascade",
    "59486" => "Pondera",
    "59487" => "Cascade",
    "59489" => "Fergus",
    "59501" => "Hill",
    "59520" => "Chouteau",
    "59521" => "Hill",
    "59522" => "Liberty",
    "59523" => "Blaine",
    "59524" => "Phillips",
    "59525" => "Hill",
    "59526" => "Blaine",
    "59527" => "Blaine",
    "59528" => "Hill",
    "59529" => "Blaine",
    "59530" => "Hill",
    "59531" => "Liberty",
    "59532" => "Hill",
    "59535" => "Blaine",
    "59537" => "Phillips",
    "59538" => "Phillips",
    "59540" => "Hill",
    "59542" => "Blaine",
    "59544" => "Phillips",
    "59545" => "Liberty",
    "59546" => "Phillips",
    "59547" => "Blaine",
    "59601" => "Lewis and Clark",
    "59602" => "Lewis and Clark",
    "59604" => "Lewis and Clark",
    "59620" => "Lewis and Clark",
    "59623" => "Lewis and Clark",
    "59624" => "Lewis and Clark",
    "59625" => "Lewis and Clark",
    "59626" => "Lewis and Clark",
    "59631" => "Jefferson",
    "59632" => "Jefferson",
    "59633" => "Lewis and Clark",
    "59634" => "Jefferson",
    "59635" => "Lewis and Clark",
    "59636" => "Lewis and Clark",
    "59638" => "Jefferson",
    "59639" => "Lewis and Clark",
    "59640" => "Lewis and Clark",
    "59641" => "Broadwater",
    "59642" => "Meagher",
    "59643" => "Broadwater",
    "59644" => "Broadwater",
    "59645" => "Meagher",
    "59647" => "Broadwater",
    "59648" => "Lewis and Clark",
    "59701" => "Silver Bow",
    "59702" => "Silver Bow",
    "59703" => "Silver Bow",
    "59707" => "Silver Bow",
    "59710" => "Madison",
    "59711" => "Deer Lodge",
    "59713" => "Powell",
    "59714" => "Gallatin",
    "59715" => "Gallatin",
    "59716" => "Gallatin",
    "59717" => "Gallatin",
    "59718" => "Gallatin",
    "59719" => "Gallatin",
    "59720" => "Madison",
    "59721" => "Madison",
    "59722" => "Powell",
    "59724" => "Beaverhead",
    "59725" => "Beaverhead",
    "59727" => "Silver Bow",
    "59728" => "Powell",
    "59729" => "Madison",
    "59730" => "Gallatin",
    "59731" => "Powell",
    "59732" => "Beaverhead",
    "59733" => "Powell",
    "59735" => "Madison",
    "59736" => "Beaverhead",
    "59739" => "Beaverhead",
    "59740" => "Madison",
    "59741" => "Gallatin",
    "59743" => "Silver Bow",
    "59745" => "Madison",
    "59746" => "Beaverhead",
    "59747" => "Madison",
    "59748" => "Silver Bow",
    "59749" => "Madison",
    "59750" => "Silver Bow",
    "59751" => "Madison",
    "59752" => "Gallatin",
    "59754" => "Madison",
    "59755" => "Madison",
    "59756" => "Deer Lodge",
    "59758" => "Gallatin",
    "59759" => "Jefferson",
    "59760" => "Gallatin",
    "59761" => "Beaverhead",
    "59762" => "Beaverhead",
    "59771" => "Gallatin",
    "59772" => "Gallatin",
    "59773" => "Gallatin",
    "59801" => "Missoula",
    "59802" => "Missoula",
    "59803" => "Missoula",
    "59804" => "Missoula",
    "59806" => "Missoula",
    "59807" => "Missoula",
    "59808" => "Missoula",
    "59812" => "Missoula",
    "59820" => "Mineral",
    "59821" => "Lake",
    "59823" => "Missoula",
    "59824" => "Lake",
    "59825" => "Missoula",
    "59826" => "Missoula",
    "59827" => "Ravalli",
    "59828" => "Ravalli",
    "59829" => "Ravalli",
    "59830" => "Mineral",
    "59831" => "Sanders",
    "59832" => "Granite",
    "59833" => "Ravalli",
    "59834" => "Missoula",
    "59835" => "Ravalli",
    "59837" => "Granite",
    "59840" => "Ravalli",
    "59841" => "Ravalli",
    "59842" => "Mineral",
    "59843" => "Powell",
    "59844" => "Sanders",
    "59845" => "Flathead",
    "59846" => "Missoula",
    "59847" => "Missoula",
    "59848" => "Sanders",
    "59851" => "Missoula",
    "59853" => "Sanders",
    "59854" => "Powell",
    "59855" => "Lake",
    "59856" => "Sanders",
    "59858" => "Granite",
    "59859" => "Sanders",
    "59860" => "Lake",
    "59863" => "Lake",
    "59864" => "Lake",
    "59865" => "Lake",
    "59866" => "Mineral",
    "59867" => "Mineral",
    "59868" => "Missoula",
    "59870" => "Ravalli",
    "59871" => "Ravalli",
    "59872" => "Mineral",
    "59873" => "Sanders",
    "59874" => "Sanders",
    "59875" => "Ravalli",
    "59901" => "Flathead",
    "59903" => "Flathead",
    "59904" => "Flathead",
    "59910" => "Lake",
    "59911" => "Flathead",
    "59912" => "Flathead",
    "59913" => "Flathead",
    "59914" => "Lake",
    "59915" => "Lake",
    "59916" => "Flathead",
    "59917" => "Lincoln",
    "59918" => "Lincoln",
    "59919" => "Flathead",
    "59920" => "Flathead",
    "59921" => "Flathead",
    "59922" => "Flathead",
    "59923" => "Lincoln",
    "59925" => "Flathead",
    "59926" => "Flathead",
    "59927" => "Flathead",
    "59928" => "Flathead",
    "59929" => "Lake",
    "59930" => "Lincoln",
    "59931" => "Lake",
    "59932" => "Flathead",
    "59933" => "Lincoln",
    "59934" => "Lincoln",
    "59935" => "Lincoln",
    "59936" => "Flathead",
    "59937" => "Flathead"
];