ZIP Codes of Sibley County, MN

Population & People
Population & People
Total Population
13,433
Household Income
Household Income
Median Income
$76,840
Housing
Housing
Total Housing Units
5,946
Business & Economy
Business & Economy
Total Businesses
327
Employment
Employment
Employment Rate
62.72%
Education
Education
Bachelor's Degree+
18.41%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 7 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:7 ZIP Codes (6 Standard, 1 PO Box, 0 Unique) [See All]
Area Codes:507 / 924
Timezone:Central (GMT -06:00)
Local Time:11:53:57 PM
Population:13,433 [See All]
FIPS:27143
Land Area:512 sq mi
Water Area:8 sq mi
Coordinates:44.5893, -94.2011
Quick Link:
https://www.zip-codes.com/county/mn-sibley.asp
Need Sibley data in your app? Look up ZIP, county, and city data with a single API call.
Try Free
Minnesota's #59 most populous county
13,433 residents across 7 ZIPs — #59 of 93 Minnesota counties.

Standout ZIPs in this County


Most Populous
Arlington · 2,981 people
22.2% of county total
Highest Income
Henderson · $101,250 median
1.3× county average
Largest Land Area
Gibbon · 114.9 sq mi
Spans the most ground
Fastest Growth
Henderson · 17.6% (10-yr)
2,016 → 2,370 residents
Most Educated
Henderson · 26.0% bachelor's+
421 of 1,618 adults 25+

Things worth knowing about Sibley County


13,433 residents live across 7 ZIPs covering 512 sq mi, served by 7 distinct USPS-recognized cities.

Population moved from 13,499 to 13,433 from 2014 to 2024 — a -0.5% change. 2 ZIPs gained residents, 5 lost.

The county's wealthiest ZIP 56044 (Henderson, $101,250 median) and poorest ZIP 55335 (Gibbon, $62,206) are 29.6 miles apart — a 1.6× income gap across local geography.

Median home values vary 2.2× across this county — from $149,300 in 55335 (Gibbon) to $333,600 in 56044 (Henderson).

Density varies 70× across the county — from 14 people/sq mi in 55335 (Gibbon) to 1,013 in 55366 (New Auburn).

Educational attainment ranges from 12.7% bachelor's+ in 55366 (New Auburn) to 26.0% in 56044 (Henderson) — the breadth of educational profiles across the area.

Within Minnesota, this is the #59 most populous of 93 counties and ranks #44 for median household income .

Weighted by population, the typical household earns about $76,801 across the county — reflecting what a typical resident sees, not a simple ZIP average.

18.4% of adults age 25+ hold a bachelor's degree or higher (1,733 of 9,414 reporting).

6 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Sibley 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
512
square miles
Avg density
26.2
people per sq mi
Population
13,433
across 7 ZIPs
Gibbon
114.9 sq mi
1,666 residents
Winthrop
108.4 sq mi
2,288 residents
Henderson
83.1 sq mi
2,370 residents

All ZIP Codes in Sibley County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
55307ArlingtonStandard2,981$73,53380.4-9.5%
55334GaylordStandard2,727$66,14982.8-3.2%
56044HendersonStandard2,370$101,25083.117.6%
55396WinthropStandard2,288$75,680108.46.0%
55335GibbonStandard1,666$62,206114.9-0.7%
55338Green IsleStandard978$86,56341.8-4.0%
55366New AuburnPO Box423$72,5000.4-18.3%

Adjacent & Nearby Counties