Koochiching County, MN ZIP codes
There are 12 ZIP codes in Koochiching County, MN, in 12 towns, from 55772 to 56679. The largest are 56649 (International Falls), 56653 (Littlefork) and 56661 (Northome). 1 more crosses into it from a neighbouring county: 55771.
The county seat is International Falls.
- ZIP codes
- 12
- Partly in it
- 1 more
- Towns
- 12
- County seat
- International Falls
- County FIPS
27071- State
- Minnesota
- Population
- 11,833
- Median household income
- $66,940
- Land area
- 3,105 sq mi
Koochiching County ZIP codes by town
- International Falls (county seat)
- 56649
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 Koochiching County
This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Koochiching County.
- 55771 Orr · mostly in St. Louis County
Map of Koochiching County ZIP codes
The ZIP codes of Koochiching 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.
Koochiching County in numbers
About 11,833 people live in Koochiching County, in 5,872 households, the 62nd most populous of Minnesota's 87 counties. The median household income is $66,940 a year, 25% below the Minnesota median of $89,062 (US: $80,734). The median owner-occupied home is valued at $156,600 (52% below the Minnesota median), and median gross rent is $671 a month. The median age is 51.6; 22.0% of adults 25 and over hold a bachelor's degree or higher (39.4% across Minnesota); the average commute takes 16 minutes.
| Population | 11,833 |
|---|---|
| Households | 5,872 |
| Median age | 51.6 |
| Median household income | $66,940 |
| Median home value | $156,600 |
| Median gross rent | $671 |
| Bachelor's degree or higher | 22.0% |
| Mean commute | 16.3 min |
| Population density | 4 / 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 Koochiching County
| Town | ZIP codes | Population |
|---|---|---|
| International Falls | 1 | 5,642 |
| Littlefork | 1 | 636 |
| Ranier | 1 | 509 |
| Kabetogama | 1 | 264 |
| Birchdale | 1 | 224 |
| Nett Lake | 1 | 171 |
| Northome | 1 | 159 |
| Big Falls | 1 | 136 |
| Loman | 1 | 109 |
| Mizpah | 1 | 58 |
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 Koochiching County.
Not sure you are in Koochiching County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Koochiching County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
55772 | Nett Lake , MN | Standard | 77 | — | $157,100 |
56627 | Big Falls , MN | Standard | 192 | $36,500 | $69,200 |
56629 | Birchdale , MN | Standard | 224 | $90,938 | $212,100 |
56649 | International Falls , MN | Standard | 8,825 | $64,736 | $153,600 |
56653 | Littlefork , MN | Standard | 1,239 | $74,583 | $168,900 |
56654 | Loman , MN | Standard | 109 | $51,250 | $254,200 |
56658 | Margie , MN | Standard | 0 | — | — |
56660 | Mizpah , MN | Standard | 193 | $64,464 | $152,200 |
56661 | Northome , MN | Standard | 895 | $65,469 | $194,300 |
56668 | Ranier , MN | Standard | 217 | $116,250 | $183,900 |
56669 | Kabetogama , MN | Standard | 264 | $64,688 | $272,200 |
56679 | South International Falls , MN | No street area | — | — | — |
Cite this page
zipcodes.pro. “Koochiching County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/mn/county/koochiching
Underlying data is public domain or openly licensed — sources, vintages and licences.