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/LAKE

Lake County, MT ZIP codes

There are 12 ZIP codes in Lake County, MT, in 12 towns, from 59824 to 59931. The largest are 59860 (Polson), 59911 (Bigfork) and 59864 (Ronan). 2 more cross into it from neighbouring counties: 59821 and 59845.

The county seat is Polson.

ZIP codes
12
Partly in it
2 more
Towns
12
County seat
Polson
County FIPS
30047
State
Montana
Population
32,561
Median household income
$63,360
Land area
1,490 sq mi

Lake County ZIP codes by town

Polson (county seat)
59860

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 Lake County

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

Map of Lake County ZIP codes

598245985559860598635986459865599105991159914599155992959931

The ZIP codes of Lake 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.

Lake County in numbers

About 32,561 people live in Lake County, in 12,576 households, the 9th most populous of Montana's 56 counties. The median household income is $63,360 a year, 13% below the Montana median of $72,509 (US: $80,734). The median owner-occupied home is valued at $421,800 (12% above the Montana median), and median gross rent is $901 a month. The median age is 44.3; 31.5% of adults 25 and over hold a bachelor's degree or higher (35.2% across Montana); the average commute takes 23 minutes.

Population32,561Lake32,561
Households12,576Lake12,576
Median age44.3Lake44.3Montana40.4US 38.9
Median household income$63,360Lake$63,360Montana$72,509US $80,734
Median home value$421,800Lake$421,800Montana$375,800US $332,700
Median gross rent$901Lake$901Montana$1,081US $1,413
Bachelor's degree or higher31.5%Lake31.5%Montana35.2%US 35.7%
Mean commute22.9 minLake22.9 minMontana19.1 minUS 26.4 min
Population density22 / sq miLake22 / 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 Lake County

Largest towns in Lake County
TownZIP codesPopulation
Bigfork 1 5,565
Polson 1 5,428
Ronan 1 2,001
Pablo 1 1,632
St. Ignatius 1 977
Charlo 1 306
Elmo 1 290
Proctor 1 230
Big Arm 1 190
Ravalli 1 146
Rollins 1 115
Dayton 1 88

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 Lake County.

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

Every ZIP code in Lake County, with figures

ZIP codes in Lake County
ZIP City Type Population Median income Median home
59824 Charlo , MT Standard 1,526 $53,382 $317,800
59855 Pablo , MT Standard 419 $32,688 $160,600
59860 Polson , MT Standard 11,897 $62,047 $441,500
59863 Ravalli , MT Standard 146 $78,922 —
59864 Ronan , MT Standard 7,301 $61,978 $297,700
59865 Saint Ignatius , MT Standard 3,635 $56,473 $345,300
59910 Big Arm , MT Standard 692 $99,886 $588,500
59911 Bigfork , MT Standard 9,493 $83,019 $666,400
59914 Dayton , MT Standard 345 $83,750 $1,214,300
59915 Elmo , MT Standard 452 $58,750 —
59929 Proctor , MT Standard 230 $101,250 —
59931 Rollins , MT Standard 335 $112,083 $742,600

Cite this page

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

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