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/MN/COUNTY/POLK

Polk County, MN ZIP codes

There are 16 ZIP codes in Polk County, MN, in 16 towns, from 56517 to 56762. The largest are 56721 (East Grand Forks), 56716 (Crookston) and 56542 (Fosston).

The county seat is Crookston.

ZIP codes
16
Towns
16
County seat
Crookston
County FIPS
27119
Population
30,705
Median household income
$73,107
Land area
1,971 sq mi
Area code
218
Metro area
Grand Forks

Polk County ZIP codes by town

Crookston (county seat)
56716

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.

Map of Polk County ZIP codes

56517565235653556540565425655656568565925664656684567165672156722567235673656762

The ZIP codes of Polk 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.

Polk County in numbers

About 30,705 people live in Polk County, in 12,360 households, the 35th most populous of Minnesota's 87 counties. The median household income is $73,107 a year, 18% below the Minnesota median of $89,062 (US: $80,734). The median owner-occupied home is valued at $222,800 (32% below the Minnesota median), and median gross rent is $855 a month. The median age is 39.8; 28.0% of adults 25 and over hold a bachelor's degree or higher (39.4% across Minnesota); the average commute takes 19 minutes.

Population30,705Polk30,705
Households12,360Polk12,360
Median age39.8Polk39.8Minnesota38.8US 38.9
Median household income$73,107Polk$73,107Minnesota$89,062US $80,734
Median home value$222,800Polk$222,800Minnesota$329,300US $332,700
Median gross rent$855Polk$855Minnesota$1,280US $1,413
Bachelor's degree or higher28.0%Polk28.0%Minnesota39.4%US 35.7%
Mean commute18.6 minPolk18.6 minMinnesota22.7 minUS 26.4 min
Population density16 / sq miPolk16 / 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 Polk County

Largest towns in Polk County
TownZIP codesPopulation
East Grand Forks 1 9,028
Crookston 1 7,344
Warren 1 1,680
Fosston 1 1,374
Mcintosh 1 847
Fertile 1 803
Erskine 1 427
Fisher 1 396
Euclid 1 377
Climax 1 209
Winger 1 157
Mentor 1 131
Nielsville 1 102
Beltrami 1 72
Gully 1 53

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 Polk County.

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

Every ZIP code in Polk County, with figures

ZIP codes in Polk County
ZIP City Type Population Median income Median home
56517 Beltrami , MN Standard 255 $92,500 $167,700
56523 Climax , MN Standard 382 $56,685 $147,000
56535 Erskine , MN Standard 1,307 $65,536 $233,600
56540 Fertile , MN Standard 1,891 $83,646 $194,800
56542 Fosston , MN Standard 2,486 $59,706 $186,300
56556 Mcintosh , MN Standard 1,312 $61,786 $150,600
56568 Nielsville , MN Standard 140 $40,000 $94,000
56592 Winger , MN Standard 550 $59,167 $140,900
56646 Gully , MN Standard 266 $48,750 $205,300
56684 Trail , MN Standard 280 $73,750 $138,800
56716 Crookston , MN Standard 8,903 $59,744 $196,100
56721 East Grand Forks , MN Standard 10,679 $82,525 $259,300
56722 Euclid , MN Standard 377 $94,375 $217,100
56723 Fisher , MN Standard 838 $106,250 $225,000
56736 Mentor , MN Standard 687 $95,000 $417,100
56762 Warren , MN Standard 2,433 $62,933 $160,100

Cite this page

zipcodes.pro. “Polk County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/mn/county/polk

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