ZIP Codes of Treasure County, MT

Population & People
Population & People
Total Population
996
Household Income
Household Income
Median Income
$64,882
Housing
Housing
Total Housing Units
533
Business & Economy
Business & Economy
Total Businesses
15
Employment
Employment
Employment Rate
58.75%
Education
Education
Bachelor's Degree+
34.01%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 3 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:3 ZIP Codes (3 Standard, 0 PO Box, 0 Unique) [See All]
Area Code:406
Timezone:Mountain (GMT -07:00)
Local Time:2:12:54 PM
Population:996 [See All]
FIPS:30103
Land Area:1,401 sq mi
Water Area:7 sq mi
Coordinates:46.1042, -107.1507
Quick Link:
https://www.zip-codes.com/county/mt-treasure.asp
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Montana's shortest commutes
13-minute avg commute — the shortest in the state.

Standout ZIPs in this County


Most Populous
Hysham · 750 people
75.3% of county total
Highest Income
Bighorn · $73,250 median
1.1× county average
Largest Land Area
Hysham · 823.1 sq mi
Spans the most ground
Fastest Growth
— growth not calculable
Most Educated
— no education data

Things worth knowing about Treasure County


996 residents live across 3 ZIPs covering 1,401 sq mi, served by 3 distinct USPS-recognized cities.

Population moved from 860 to 996 from 2014 to 2024 — a +15.8% change. 2 ZIPs gained residents, 1 lost.

The county's wealthiest ZIP 59010 (Bighorn, $73,250 median) and poorest ZIP 59038 (Hysham, $56,513) are 16.8 miles apart — a 1.3× income gap across local geography.

Median home values vary 1.5× across this county — from $227,000 in 59038 (Hysham) to $344,700 in 59010 (Bighorn).

Density varies across the county — from 0 people/sq mi in 59010 (Bighorn) to 1 in 59038 (Hysham).

Educational attainment ranges from 31.7% bachelor's+ in 59038 (Hysham) to 37.3% in 59010 (Bighorn) — the breadth of educational profiles across the area.

Within Montana, this is the #54 most populous of 56 counties and ranks #33 for median household income with the #8 fastest decade growth .

Weighted by population, the typical household earns about $60,309 across the county — reflecting what a typical resident sees, not a simple ZIP average.

34.0% of adults age 25+ hold a bachelor's degree or higher (252 of 741 reporting).

3 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Treasure County


Big & sparse

A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
1,401
square miles
Avg density
0.7
people per sq mi
Population
996
across 3 ZIPs
Hysham
823.1 sq mi
750 residents
Bighorn
565.7 sq mi
220 residents
Sanders
12.0 sq mi
26 residents

Single-ZIP anchor

One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.

Hysham

All ZIP Codes in Treasure County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
59038HyshamStandard750$56,513823.115.4%
59010BighornStandard220$73,250565.789.7%
59076SandersStandard2612.0-72.3%

Adjacent & Nearby Counties