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zipcodes.pro — STATE/MT/COUNTY/BLAINE

Blaine County, MT ZIP codes

There are 7 ZIP codes in Blaine County, MT, in 7 towns, from 59523 to 59547. The largest are 59523 (Chinook), 59526 (Harlem) and 59542 (Turner).

The county seat is Chinook.

ZIP codes
7
Towns
7
County seat
Chinook
County FIPS
30005
State
Montana
Population
6,949
Median household income
$64,813
Land area
4,228 sq mi

Blaine County ZIP codes by town

Chinook (county seat)
59523

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.

Map of Blaine County ZIP codes

59523595265952759529595355954259547

The ZIP codes of Blaine 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.

Blaine County in numbers

About 6,949 people live in Blaine County, in 2,280 households, the 31st most populous of Montana's 56 counties. The median household income is $64,813 a year, 11% below the Montana median of $72,509 (US: $80,734). The median owner-occupied home is valued at $155,500 (59% below the Montana median), and median gross rent is $660 a month. The median age is 35.6; 23.9% of adults 25 and over hold a bachelor's degree or higher (35.2% across Montana); the average commute takes 15 minutes.

Population6,949Blaine6,949
Households2,280Blaine2,280
Median age35.6Blaine35.6Montana40.4US 38.9
Median household income$64,813Blaine$64,813Montana$72,509US $80,734
Median home value$155,500Blaine$155,500Montana$375,800US $332,700
Median gross rent$660Blaine$660Montana$1,081US $1,413
Bachelor's degree or higher23.9%Blaine23.9%Montana35.2%US 35.7%
Mean commute15.4 minBlaine15.4 minMontana19.1 minUS 26.4 min
Population density2 / sq miBlaine2 / 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 Blaine County

Largest towns in Blaine County
TownZIP codesPopulation
Chinook 1 1,353
Hays 1 1,009
Harlem 1 822
Turner 1 69
Zurich 1 38
Lloyd 1 33
Hogeland 1 5

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 Blaine County.

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

Every ZIP code in Blaine County, with figures

ZIP codes in Blaine County
ZIP City Type Population Median income Median home
59523 Chinook , MT Standard 2,356 $73,906 $218,300
59526 Harlem , MT Standard 2,319 $63,869 $85,200
59527 Hays , MT Standard 1,345 $54,500 $80,800
59529 Hogeland , MT Standard 144 $87,841 $325,000
59535 Lloyd , MT Standard 33 — —
59542 Turner , MT Standard 442 $57,222 $187,500
59547 Zurich , MT Standard 51 — $131,300

Cite this page

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

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