ZIP Codes of Clay County, MN

Population & People
Population & People
Total Population
66,423
Household Income
Household Income
Median Income
$84,603
Housing
Housing
Total Housing Units
27,699
Business & Economy
Business & Economy
Total Businesses
1,304
Employment
Employment
Employment Rate
67.24%
Education
Education
Bachelor's Degree+
39.14%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 14 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:14 ZIP Codes (12 Standard, 2 PO Box, 0 Unique) [See All]
Area Codes:218 / 320
Timezone:Central (GMT -06:00)
Local Time:2:12:36 PM
Population:66,423 [See All]
FIPS:27027
CBSA:Fargo, ND-MN
Land Area:1,130 sq mi
Water Area:7 sq mi
Coordinates:46.8825, -96.5747
Quick Link:
https://www.zip-codes.com/county/mn-clay.asp
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Extreme geographic sprawl
The largest ZIP spans 2908× the smallest by area — 212.9 sq mi down to 0.07.

Standout ZIPs in this County


Most Populous
Moorhead · 44,405 people
66.9% of county total
Highest Income
Sabin · $107,813 median
1.3× county average
Largest Land Area
Barnesville · 212.9 sq mi
Spans the most ground
Fastest Growth
Hawley · 16.7% (10-yr)
4,310 → 5,028 residents
Most Educated
Moorhead · 41.6% bachelor's+
11,401 of 27,375 adults 25+

Things worth knowing about Clay County


66,423 residents live across 14 ZIPs covering 1,130 sq mi, served by 11 distinct USPS-recognized cities.

Population moved from 60,482 to 64,610 from 2014 to 2024 — a +6.8% change. 7 ZIPs gained residents, 4 lost.

The county's wealthiest ZIP 56580 (Sabin, $107,813 median) and poorest ZIP 56552 (Hitterdal, $51,786) are 25.1 miles apart — a 2.1× income gap across local geography.

Median home values vary 1.8× across this county — from $193,300 in 56552 (Hitterdal) to $341,500 in 56549 (Hawley).

Density varies 2363× across the county — from 6 people/sq mi in 56536 (Felton) to 13,019 in 56563 (Moorhead).

Educational attainment ranges from 16.8% bachelor's+ in 56552 (Hitterdal) to 41.6% in 56560 (Moorhead) — the breadth of educational profiles across the area.

Within Minnesota, this is the #16 most populous of 93 counties and ranks #19 for median household income with the #11 fastest decade growth .

Weighted by population, the typical household earns about $81,989 across the county — reflecting what a typical resident sees, not a simple ZIP average.

39.1% of adults age 25+ hold a bachelor's degree or higher (16,001 of 40,879 reporting).

12 Standard delivery, 2 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Clay County


Big & sparse

A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
1,130
square miles
Avg density
58.8
people per sq mi
Population
66,423
across 14 ZIPs
Barnesville
212.9 sq mi
3,994 residents
Hawley
212.3 sq mi
5,028 residents
Glyndon
154.1 sq mi
2,762 residents

Single-ZIP anchor

One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.

Moorhead

All ZIP Codes in Clay County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
56560MoorheadStandard44,405$75,406153.96.4%
56549HawleyStandard5,028$105,968212.316.7%
56529DilworthStandard4,713$90,6943.514.8%
56514BarnesvilleStandard3,994$100,845212.97.8%
56547GlyndonStandard2,762$102,500154.1-5.0%
56580SabinStandard1,305$107,81365.02.4%
56563MoorheadStandard1,2850.1
56585UlenStandard1,064$71,250127.8-11.8%
56562MoorheadStandard5280.1
56552HitterdalStandard527$51,78648.633.4%
56536FeltonStandard502$69,37591.128.1%
56546GeorgetownStandard210$78,75058.9-33.3%
56525ComstockPO Box100$76,2502.0-25.4%
56561MoorheadPO Box0.0

Adjacent & Nearby Counties