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County ZIP codes · Montana · FIPS 30089

Sanders County, MT ZIP Codes

Sanders County, Montana has 11 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 9 of the residential ones lie mainly in Sanders County and 2 mainly in a neighboring county; 3 cross the county line. Median household income ranges from $31,970 in 59845 (Hot Springs) to $66,458 in 59821 (Arlee) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Sanders County?

59821 · Arlee: $67k59831 · Dixon: $46k59844 · Heron: $43k59845 · Hot Springs: $32k59848 · Lonepine: $37k59853 · Noxon: $60k59856 · Paradise: –59859 · Plains: $65k59866 · Saint Regis: $74k59873 · Thompson Falls: $60k59874 · Trout Creek: $64k598595987359845598745986659853598215983159844598485985659821 · Arlee: $67k59831 · Dixon: $46k59844 · Heron: $43k59845 · Hot Springs: $32k59848 · Lonepine: $37k59853 · Noxon: $60k59856 · Paradise: –59859 · Plains: $65k59866 · Saint Regis: $74k59873 · Thompson Falls: $60k59874 · Trout Creek: $64k598595987359845598745986659853598215983159821 · Arlee: $67k59831 · Dixon: $46k59844 · Heron: $43k59845 · Hot Springs: $32k59848 · Lonepine: $37k59853 · Noxon: $60k59856 · Paradise: –59859 · Plains: $65k59866 · Saint Regis: $74k59873 · Thompson Falls: $60k59874 · Trout Creek: $64k59859598735984559874598665985359821
The residential ZIP codes of Sanders 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 $60,000 and $64,319.

They carry 11 postal town names.

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

All 11 residential ZIP codes in Sanders County

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

Residential ZIP codes mainly in Sanders County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
59859 Plains 4,360 6 $65k $429k 100%
59873 Thompson Falls 2,920 4 $60k $306k 100%
59874 Trout Creek 2,266 6 $64k $540k 100%
59845 Hot Springs 1,223 3 $32k $191k 67%
59853 Noxon 1,030 3 $60k $293k 100%
59844 Heron 712 9 $43k $441k 100%
59831 Dixon 544 5 $46k $198k 100%
59856 Paradise 130 7 – – 100%
59848 Lonepine 81 3 $37k $463k 100%

Partly in Sanders County

Residential ZIP codes mainly in another county that reach at least 1% into Sanders County, by their share here
In this county
59821 Arlee 2,994 9 $67k $375k 19%
59866 Saint Regis 1,161 5 $74k $344k 9%

Download the 11 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?

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

Share of each ZIP code's land in Sanders County and in the neighboring counties
ZIPIn SandersElsewhere
5982119%Missoula County 44%; Lake County 37%
5984567%Lake County 17%; Flathead County 16%
598669%Mineral County 91%

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

Which first three digits do Sanders 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 Sanders County starts with 598.

Three-digit prefixes of Sanders 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 Sanders County's
PrefixSectional centerHereAll codes
598 Missoula, MT (SCF 598) 11 53

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