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Zip Code 59457 — Lewistown, MT

ZIP Code 59457 is associated with Lewistown, MT, in Fergus County. The listed population estimate is 9,135; estimated density is 3.5 people per square mile. Among records with population estimates, it ranks #1 of 9 in Fergus County and #31 of 368 in MT.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (47.080270, -109.386560)

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

How 59457 Compares

MetricZIP 59457Fergus County recordsMT records
Population estimate9,13511,683 (sum)1,117,606 (sum)
Population Density3.5 /sq mi----
County population rank#1 of 9----
State population rank#31 of 368----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in MT

ZIP CodeCityDistancePopulation estimate
ZIP 59464Moore17.6 mi597
ZIP 59451Hilger21.4 mi123
ZIP 59462Moccasin23.5 mi122
ZIP 59441Forest Grove24.5 mi126
ZIP 59032Grass Range30.0 mi409

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 →