Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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zipcodes.pro — STATE/MT/COUNTY/LIBERTY

Liberty County, MT ZIP codes

Liberty County, MT has 5 ZIP codes, in 5 towns: 59522, 59456, 59531, 59461 and 59545. 1 more crosses into it from a neighbouring county: 59444.

The county seat is Chester.

ZIP codes
5
Partly in it
1 more
Towns
5
County seat
Chester
County FIPS
30051
State
Montana
Population
1,952
Median household income
$57,857
Land area
1,430 sq mi

Liberty County ZIP codes by town

Chester (county seat)
59522

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

ZIP codes partly in Liberty County

This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Liberty County.

Map of Liberty County ZIP codes

5945659461595225953159545

The ZIP codes of Liberty County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Liberty County in numbers

About 1,952 people live in Liberty County, in 724 households, the 46th most populous of Montana's 56 counties. The median household income is $57,857 a year, 20% below the Montana median of $72,509 (US: $80,734). The median owner-occupied home is valued at $169,100 (55% below the Montana median), and median gross rent is $710 a month. The median age is 39.8; 27.8% of adults 25 and over hold a bachelor's degree or higher (35.2% across Montana); the average commute takes 17 minutes.

Population1,952Liberty1,952
Households724Liberty724
Median age39.8Liberty39.8Montana40.4US 38.9
Median household income$57,857Liberty$57,857Montana$72,509US $80,734
Median home value$169,100Liberty$169,100Montana$375,800US $332,700
Median gross rent$710Liberty$710Montana$1,081US $1,413
Bachelor's degree or higher27.8%Liberty27.8%Montana35.2%US 35.7%
Mean commute16.5 minLiberty16.5 minMontana19.1 minUS 26.4 min
Population density1 / sq miLiberty1 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Liberty County

Largest towns in Liberty County
TownZIP codesPopulation
Chester 1 749
Ledger 1 392
Joplin 1 265
Lothair 1 23
Whitlash 1 8

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Liberty County.

Not sure you are in Liberty County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Liberty County, with figures

ZIP codes in Liberty County
ZIP City Type Population Median income Median home
59456 Ledger , MT Standard 392 $41,123 —
59461 Lothair , MT Standard 23 — —
59522 Chester , MT Standard 1,315 $57,212 $177,100
59531 Joplin , MT Standard 351 $67,891 $110,000
59545 Whitlash , MT Standard 55 $100,781 $291,700

Cite this page

zipcodes.pro. “Liberty County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/mt/county/liberty

Underlying data is public domain or openly licensed — sources, vintages and licences.