Plain

County ZIP codes · Montana · FIPS 30051

Liberty County, MT ZIP Codes

Liberty County, Montana has 7 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 5 of the residential ones lie mainly in Liberty County and 2 mainly in a neighboring county; 5 cross the county line.

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Liberty County?

59416 · Brady: $89k59444 · Galata: $44k59456 · Ledger: $41k59461 · Lothair: –59522 · Chester: $57k59531 · Joplin: $68k59545 · Whitlash: $101k5952259444594565941659531595455946159416 · Brady: $89k59444 · Galata: $44k59456 · Ledger: $41k59461 · Lothair: –59522 · Chester: $57k59531 · Joplin: $68k59545 · Whitlash: $101k5952259444594565941659531595455946159416 · Brady: $89k59444 · Galata: $44k59456 · Ledger: $41k59461 · Lothair: –59522 · Chester: $57k59531 · Joplin: $68k59545 · Whitlash: $101k59522594445945659416595315954559461
The residential ZIP codes of Liberty County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024).<$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

All 7 residential ZIP codes in Liberty County

5 ZIP codes lie mainly in Liberty County; 2 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Liberty County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
59522 Chester 1,315 2 $57k $177k 100%
59456 Ledger 392 1 $41k – 52%
59531 Joplin 351 1 $68k $110k 73%
59545 Whitlash 55 1 $101k $292k 68%
59461 Lothair 23 1 – – 100%

Partly in Liberty County

Residential ZIP codes mainly in another county that reach at least 1% into Liberty County, by their share here
In this county
59444 Galata 222 1 $44k – 20%
59416 Brady 425 1 $89k $163k 1%

Download the 7 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

5 ZIP codes of Liberty County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Liberty County and in the neighboring counties
ZIPIn LibertyElsewhere
594161%Pondera County56%; Chouteau County41%; Teton County2%
5945652%Toole County39%; Pondera County10%
5953173%Hill County27%
5944420%Toole County80%
5954568%Toole County32%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do Liberty County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Liberty County's ZIP codes use 2 prefixes: 594 and 595.

Three-digit prefixes of Liberty County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Liberty County's
PrefixSectional centerHereAll codes
594Great Falls, MT (SCF 594)464
595Great Falls, MT (SCF 594)323

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.