ZIP Codes of Broadwater County, MT

Population & People
Population & People
Total Population
5,412
Household Income
Household Income
Median Income
$59,321
Housing
Housing
Total Housing Units
2,507
Business & Economy
Business & Economy
Total Businesses
151
Employment
Employment
Employment Rate
51.54%
Education
Education
Bachelor's Degree+
19.85%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 4 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:4 ZIP Codes (4 Standard, 0 PO Box, 0 Unique) [See All]
Area Code:406
Timezone:Mountain (GMT -07:00)
Local Time:2:12:52 PM
Population:5,412 [See All]
FIPS:30007
CBSA:Helena, MT
Land Area:1,114 sq mi
Water Area:45 sq mi
Coordinates:46.3175, -111.5586
Quick Link:
https://www.zip-codes.com/county/mt-broadwater.asp
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Extreme education divide
Bachelor's share ranges 8.4% to 58.9% across ZIPs — a 51-point gap.
Montana's longest commutes
33-minute average travel time to work.

Standout ZIPs in this County


Most Populous
Townsend · 4,187 people
77.4% of county total
Highest Income
Townsend · $68,811 median
1.2× county average
Largest Land Area
Townsend · 698.9 sq mi
Spans the most ground
Fastest Growth
Townsend · -0.9% (10-yr)
4,226 → 4,187 residents
Most Educated
Townsend · 19.6% bachelor's+
622 of 3,168 adults 25+

Things worth knowing about Broadwater County


5,412 residents live across 4 ZIPs covering 1,114 sq mi, served by 4 distinct USPS-recognized cities.

Population moved from 5,046 to 5,412 from 2014 to 2024 — a +7.3% change. 2 ZIPs gained residents, 1 lost.

The county's wealthiest ZIP 59644 (Townsend, $68,811 median) and poorest ZIP 59643 (Toston, $49,831) are 23.0 miles apart — a 1.4× income gap across local geography.

Median home values vary 1.1× across this county — from $337,300 in 59647 (Winston) to $361,500 in 59644 (Townsend).

Density varies across the county — from 3 people/sq mi in 59643 (Toston) to 6 in 59644 (Townsend).

Educational attainment ranges from 8.4% bachelor's+ in 59643 (Toston) to 58.9% in 59647 (Winston) — the breadth of educational profiles across the area.

Within Montana, this is the #34 most populous of 56 counties and ranks #43 for median household income with the #22 fastest decade growth .

Weighted by population, the typical household earns about $65,555 across the county — reflecting what a typical resident sees, not a simple ZIP average.

19.8% of adults age 25+ hold a bachelor's degree or higher (794 of 4,001 reporting).

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

Stories about Broadwater 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
1,114
square miles
Avg density
4.9
people per sq mi
Population
5,412
across 4 ZIPs
Townsend
698.9 sq mi
4,187 residents
Toston
330.3 sq mi
867 residents
Winston
85.1 sq mi
358 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.

Townsend

All ZIP Codes in Broadwater County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
59644TownsendStandard4,187$68,811698.9-0.9%
59643TostonStandard867$49,831330.336.1%
59647WinstonStandard35885.195.6%
59641RadersburgStandard0.0

Adjacent & Nearby Counties