Pennington County, MN ZIP codes
Pennington County, MN has 3 ZIP codes, in 3 towns: 56701, 56725 and 56754. 2 more cross into it from neighbouring counties: 56750 and 56684.
The county seat is Thief River Falls.
- ZIP codes
- 3
- Partly in it
- 2 more
- Towns
- 3
- County seat
- Thief River Falls
- County FIPS
27113- State
- Minnesota
- Population
- 13,791
- Median household income
- $77,325
- Land area
- 617 sq mi
Pennington County ZIP codes by town
- Thief River Falls (county seat)
- 56701
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 Pennington County
These ZIP codes lie mostly in a neighbouring county but each cover a twentieth or more of Pennington County.
- 56684 Trail · mostly in Polk County
- 56750 Red Lake Falls · mostly in Red Lake County
Map of Pennington County ZIP codes
The ZIP codes of Pennington 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.
Pennington County in numbers
About 13,791 people live in Pennington County, in 6,207 households, the 60th most populous of Minnesota's 87 counties. The median household income is $77,325 a year, 13% below the Minnesota median of $89,062 (US: $80,734). The median owner-occupied home is valued at $195,500 (41% below the Minnesota median), and median gross rent is $862 a month. The median age is 39.6; 21.0% of adults 25 and over hold a bachelor's degree or higher (39.4% across Minnesota); the average commute takes 12 minutes.
| Population | 13,791 |
|---|---|
| Households | 6,207 |
| Median age | 39.6 |
| Median household income | $77,325 |
| Median home value | $195,500 |
| Median gross rent | $862 |
| Bachelor's degree or higher | 21.0% |
| Mean commute | 12.4 min |
| Population density | 22 / 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 Pennington County
| Town | ZIP codes | Population |
|---|---|---|
| Thief River Falls | 1 | 8,823 |
| St. Hilaire | 1 | 259 |
| Goodridge | 1 | 49 |
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 Pennington County.
Not sure you are in Pennington County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Pennington County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
56701 | Thief River Falls , MN | Standard | 12,705 | $78,599 | $196,000 |
56725 | Goodridge , MN | Standard | 941 | $72,917 | $220,200 |
56754 | Saint Hilaire , MN | Standard | 491 | $79,167 | $215,800 |
Cite this page
zipcodes.pro. “Pennington County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/mn/county/pennington
Underlying data is public domain or openly licensed — sources, vintages and licences.