Home > MT > Mineral County > Saint Regis > Zip 59866

Zip Code 59866 — Saint Regis, MT

ZIP Code 59866 is associated with Saint Regis, MT, in Mineral County. The listed population estimate is 1,161; estimated density is 2.0 people per square mile. Among records with population estimates, it ranks #3 of 6 in Mineral County and #125 of 368 in MT.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (47.322070, -115.123290)

Data MetricLocal Statistic
Postal / Zip Code59866
Primary CitySaint Regis
State / ProvinceMT
CountyMineral
Total Population1,161
Population Density2.0 people/sq mi
TimezoneAmerica/Denver

How 59866 Compares

MetricZIP 59866Mineral County recordsMT records
Population estimate1,1615,729 (sum)1,117,606 (sum)
Population Density2.0 /sq mi----
County population rank#3 of 6----
State population rank#125 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 59842Haugan13.0 mi46
ZIP 59830De Borgia17.5 mi102
ZIP 59872Superior18.3 mi2,501
ZIP 59856Paradise18.6 mi130
ZIP 59859Plains20.3 mi4,360

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 →