ZIP Codes of Fallon County, MT

Population & People
Population & People
Total Population
2,775
Household Income
Household Income
Median Income
$84,181
Housing
Housing
Total Housing Units
1,500
Business & Economy
Business & Economy
Total Businesses
126
Employment
Employment
Employment Rate
57.92%
Education
Education
Bachelor's Degree+
15.25%
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 (2 Standard, 1 PO Box, 0 Unique) [See All]
Area Code:406
Timezone:Mountain (GMT -07:00)
Local Time:2:12:52 PM
Population:2,775 [See All]
FIPS:30025
Land Area:1,468 sq mi
Water Area:2 sq mi
Coordinates:46.2661, -104.4364
Quick Link:
https://www.zip-codes.com/county/mt-fallon.asp
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Montana's #42 most populous county
2,775 residents across 3 ZIPs — #42 of 56 Montana counties.

Standout ZIPs in this County


Most Populous
Baker · 2,111 people
76.1% of county total
Highest Income
Plevna · $110,455 median
1.3× county average
Largest Land Area
Baker · 1,058.3 sq mi
Spans the most ground
Fastest Growth
Baker · -17.4% (10-yr)
2,555 → 2,111 residents
Most Educated
Baker · 12.3% bachelor's+
183 of 1,486 adults 25+

Things worth knowing about Fallon County


2,775 residents live across 3 ZIPs covering 1,468 sq mi, served by 3 distinct USPS-recognized cities.

Population moved from 2,970 to 2,775 from 2014 to 2024 — a -6.6% change. 2 ZIPs gained residents, 1 lost.

The county's wealthiest ZIP 59344 (Plevna, $110,455 median) and poorest ZIP 59354 (Willard , $64,074) are 18.3 miles apart — a 1.7× income gap across local geography.

Median home values vary 1.2× across this county — from $231,800 in 59313 (Baker) to $287,500 in 59344 (Plevna).

Density varies across the county — from 1 people/sq mi in 59344 (Plevna) to 2 in 59313 (Baker).

Educational attainment ranges from 12.3% bachelor's+ in 59313 (Baker) to 32.4% in 59344 (Plevna) — the breadth of educational profiles across the area.

Within Montana, this is the #42 most populous of 56 counties and ranks #7 for median household income .

Weighted by population, the typical household earns about $81,465 across the county — reflecting what a typical resident sees, not a simple ZIP average.

15.3% of adults age 25+ hold a bachelor's degree or higher (288 of 1,888 reporting).

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

Stories about Fallon 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
1,468
square miles
Avg density
1.9
people per sq mi
Population
2,775
across 3 ZIPs
Baker
1,058.3 sq mi
2,111 residents
Plevna
409.7 sq mi
406 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.

Baker

Population decline

Fallon County lost 6.6% of residents between 2014 and 2024. ZIPs that shed the largest share:

Baker
-17.4%
2,555 → 2,111 residents

All ZIP Codes in Fallon County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
59313BakerStandard2,111$78,0151,058.3-17.4%
59344PlevnaStandard406$110,455409.717.3%
59354WillardPO Box258$64,0740.0273.9%

Adjacent & Nearby Counties