ZIP Codes of Carbon County, MT

Population & People
Population & People
Total Population
10,782
Household Income
Household Income
Median Income
$98,226
Housing
Housing
Total Housing Units
6,325
Business & Economy
Business & Economy
Total Businesses
457
Employment
Employment
Employment Rate
57.05%
Education
Education
Bachelor's Degree+
34.75%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 10 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:10 ZIP Codes (9 Standard, 1 PO Box, 0 Unique) [See All]
Area Code:406
Timezone:Mountain (GMT -07:00)
Local Time:11:54:10 PM
Population:10,782 [See All]
FIPS:30009
CBSA:Billings, MT
Land Area:1,871 sq mi
Water Area:12 sq mi
Coordinates:45.3144, -109.0633
Quick Link:
https://www.zip-codes.com/county/mt-carbon.asp
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Montana's highest-income county
Average median income $98,226 — the highest of 56 counties.
Striking education divide
Bachelor's share spans 16.0% to 50.6% — a 35-point gap.

Standout ZIPs in this County


Most Populous
Red Lodge · 3,977 people
36.9% of county total
Highest Income
Boyd · $200,125 median
2.0× county average
Largest Land Area
Bridger · 632.1 sq mi
Spans the most ground
Fastest Growth
Red Lodge · 19.1% (10-yr)
3,339 → 3,977 residents
Most Educated
Red Lodge · 50.6% bachelor's+
1,714 of 3,386 adults 25+

Things worth knowing about Carbon County


10,782 residents live across 10 ZIPs covering 1,871 sq mi, served by 10 distinct USPS-recognized cities.

Population moved from 9,789 to 10,782 from 2014 to 2024 — a +10.1% change. 6 ZIPs gained residents, 4 lost.

The county's wealthiest ZIP 59013 (Boyd, $200,125 median) and poorest ZIP 59014 (Bridger, $55,234) are 25.3 miles apart — a 3.6× income gap across local geography.

Median home values vary 2.5× across this county — from $212,500 in 59007 (Bearcreek) to $540,700 in 59013 (Boyd).

Density varies across the county — from 2 people/sq mi in 59014 (Bridger) to 13 in 59041 (Joliet).

Educational attainment ranges from 16.0% bachelor's+ in 59026 (Edgar) to 50.6% in 59068 (Red Lodge) — the breadth of educational profiles across the area.

Within Montana, this is the #21 most populous of 56 counties and ranks #1 for median household income with the #16 fastest decade growth .

Weighted by population, the typical household earns about $82,064 across the county — reflecting what a typical resident sees, not a simple ZIP average.

34.8% of adults age 25+ hold a bachelor's degree or higher (2,897 of 8,336 reporting).

9 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Carbon County


Two counties in one

Median household income spans 3.6× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.

Wealthiest ZIP
Boyd
Median income: $200,125
Population: 199
Bachelor's+: 36.9%
vs
Poorest ZIP (pop >= 500)
Bridger
Median income: $55,234
Population: 1,510
Bachelor's+: 19.8%
For every $1 of household income in 59014, the typical household in 59013 earns $3.62.

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
1,871
square miles
Avg density
5.8
people per sq mi
Population
10,782
across 10 ZIPs
Bridger
632.1 sq mi
1,510 residents
Red Lodge
522.9 sq mi
3,977 residents
Roberts
179.8 sq mi
1,403 residents

All ZIP Codes in Carbon County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
59068Red LodgeStandard3,977$80,962522.919.1%
59041JolietStandard2,258$80,500169.117.6%
59014BridgerStandard1,510$55,234632.1-18.5%
59070RobertsStandard1,403$96,250179.848.2%
59029FrombergStandard760$72,18897.512.3%
59008BelfryStandard456$100,469126.016.6%
59013BoydPO Box199$200,1250.03.6%
59007BearcreekStandard96$113,75029.6-29.4%
59026EdgarStandard81$90,27814.3-64.8%
59071RoscoeStandard42$92,50099.9-60.0%

Adjacent & Nearby Counties