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/RICHLAND

Richland County, MT ZIP codes

Richland County, MT has 5 ZIP codes, in 5 towns: 59270, 59221, 59262, 59243 and 59217. 4 more cross into it from neighbouring counties.

The county seat is Sidney.

ZIP codes
5
Partly in it
4 more
Towns
5
County seat
Sidney
County FIPS
30083
State
Montana
Population
11,235
Median household income
$73,084
Land area
2,085 sq mi

Richland County ZIP codes by town

Sidney (county seat)
59270

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 Richland County

These ZIP codes lie mostly in a neighbouring county but each cover a twentieth or more of Richland County.

Map of Richland County ZIP codes

5921759221592435926259270

The ZIP codes of Richland 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.

Richland County in numbers

About 11,235 people live in Richland County, in 4,422 households, the 19th most populous of Montana's 56 counties. The median household income is $73,084 a year, about the same as the Montana median of $72,509 (US: $80,734). The median owner-occupied home is valued at $263,000 (30% below the Montana median), and median gross rent is $917 a month. The median age is 38.4; 22.0% of adults 25 and over hold a bachelor's degree or higher (35.2% across Montana); the average commute takes 23 minutes.

Population11,235Richland11,235
Households4,422Richland4,422
Median age38.4Richland38.4Montana40.4US 38.9
Median household income$73,084Richland$73,084Montana$72,509US $80,734
Median home value$263,000Richland$263,000Montana$375,800US $332,700
Median gross rent$917Richland$917Montana$1,081US $1,413
Bachelor's degree or higher22.0%Richland22.0%Montana35.2%US 35.7%
Mean commute22.7 minRichland22.7 minMontana19.1 minUS 26.4 min
Population density5 / sq miRichland5 / 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 Richland County

Largest towns in Richland County
TownZIP codesPopulation
Sidney 1 6,171
Fairview 1 971
Lambert 1 446
Savage 1 316
Crane 1 187

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 Richland County.

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

Every ZIP code in Richland County, with figures

ZIP codes in Richland County
ZIP City Type Population Median income Median home
59217 Crane , MT Standard 171 $79,242 $224,200
59221 Fairview , MT Standard 1,951 $77,115 $243,600
59243 Lambert , MT Standard 446 $83,500 $335,400
59262 Savage , MT Standard 737 $76,000 $278,300
59270 Sidney , MT Standard 8,571 $72,630 $267,600

Cite this page

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

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