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Zip Code 59457 — Lewistown, MT

59457 is a ZIP Code associated with Lewistown, MT, located within Fergus. 59457 ranks #1 out of 9 ZIP codes in Fergus County by population (and #31 out of 369 in MT). The area supports an estimated population of 9,135 residents across Data Pending housing units, with a population density of 3.5 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (47.080270, -109.386560)

Data MetricLocal Statistic
Postal / Zip Code59457
Primary CityLewistown
State / ProvinceMT
CountyFergus
Total Population9,135
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density3.5 people/sq mi
TimezoneAmerica/Denver

How 59457 Compares

MetricZIP 59457Fergus CountyMT State Average
Population9,13511,683 (Total)1,117,606 (Total)
Average ZIP IncomeData PendingN/AN/A
Population Density3.5 /sq mi----
County Pop Rank#1 of 9----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 59464Moore17.6 mi597N/A
Zip 59451Hilger21.4 mi123N/A
Zip 59462Moccasin23.5 mi122N/A
Zip 59441Forest Grove24.5 mi126N/A
Zip 59032Grass Range30.0 mi409N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →