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County ZIP codes · Montana · FIPS 30005

Blaine County, MT ZIP Codes

Blaine County, Montana has 10 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 7 of the residential ones lie mainly in Blaine County and 3 mainly in a neighboring county; 5 cross the county line. Median household income ranges from $51,872 in 59501 (Havre) to $73,906 in 59523 (Chinook) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Blaine County?

59501 · Havre: $52k59520 · Big Sandy: $62k59523 · Chinook: $74k59524 · Dodson: $48k59526 · Harlem: $64k59527 · Hays: $55k59529 · Hogeland: $88k59535 · Lloyd: –59542 · Turner: $57k59547 · Zurich: –5950159524595235952059526595355954259529595475952759501 · Havre: $52k59520 · Big Sandy: $62k59523 · Chinook: $74k59524 · Dodson: $48k59526 · Harlem: $64k59527 · Hays: $55k59529 · Hogeland: $88k59535 · Lloyd: –59542 · Turner: $57k59547 · Zurich: –5950159524595235952059526595355954259529595475952759501 · Havre: $52k59520 · Big Sandy: $62k59523 · Chinook: $74k59524 · Dodson: $48k59526 · Harlem: $64k59527 · Hays: $55k59529 · Hogeland: $88k59535 · Lloyd: –59542 · Turner: $57k59547 · Zurich: –59501595245952359520595265953559542
The residential ZIP codes of Blaine 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).

How different are its ZIP codes?

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $51,872 and $63,869.

They carry 10 postal town names.

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

All 10 residential ZIP codes in Blaine County

7 ZIP codes lie mainly in Blaine County; 3 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Blaine County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
59523 Chinook 2,356 2 $74k $218k 99%
59526 Harlem 2,319 3 $64k $85k 100%
59527 Hays 1,345 6 $55k $81k 100%
59542 Turner 442 1 $57k $188k 65%
59529 Hogeland 144 0 $88k $325k 100%
59547 Zurich 51 0 – $131k 100%
59535 Lloyd 33 0 – – 100%

Partly in Blaine County

Residential ZIP codes mainly in another county that reach at least 1% into Blaine County, by their share here
In this county
59524 Dodson 643 1 $48k $62k 12%
59501 Havre 12,243 9 $52k $218k 4%
59520 Big Sandy 1,261 1 $62k $204k 2%

Download the 10 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 Blaine County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Blaine County and in the neighboring counties
ZIPIn BlaineElsewhere
595014%Hill County96%
5952399%Hill County1%
595202%Chouteau County97%
5952412%Phillips County88%
5954265%Phillips County35%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Blaine County starts with 595.

Three-digit prefixes of Blaine 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 Blaine County's
PrefixSectional centerHereAll codes
595Great Falls, MT (SCF 594)1023

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