ZIP Codes of Adams County, IA

Population & People
Population & People
Total Population
3,218
Household Income
Household Income
Median Income
$64,000
Housing
Housing
Total Housing Units
1,735
Business & Economy
Business & Economy
Total Businesses
94
Employment
Employment
Employment Rate
58.10%
Education
Education
Bachelor's Degree+
26.07%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 4 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:4 ZIP Codes (4 Standard, 0 PO Box, 0 Unique) [See All]
Area Codes:641 / 712
Timezone:Central (GMT -06:00)
Local Time:2:11:50 PM
Population:3,218 [See All]
FIPS:19003
Land Area:368 sq mi
Water Area:2 sq mi
Coordinates:41.0166, -94.7597
Quick Link:
https://www.zip-codes.com/county/ia-adams.asp
Need Adams data in your app? Look up ZIP, county, and city data with a single API call.
Try Free
Notable population decline
Lost 14.2% of residents since 2014.
Extreme geographic sprawl
The largest ZIP spans 387× the smallest by area — 232.5 sq mi down to 0.60.
Iowa's oldest county
Median age 48.6.

Standout ZIPs in this County


Most Populous
Corning · 2,340 people
72.7% of county total
Highest Income
Prescott · $76,875 median
1.2× county average
Largest Land Area
Corning · 232.5 sq mi
Spans the most ground
Fastest Growth
Corning · -16.0% (10-yr)
2,785 → 2,340 residents
Most Educated
Corning · 27.1% bachelor's+
475 of 1,755 adults 25+

Things worth knowing about Adams County


3,218 residents live across 4 ZIPs covering 368 sq mi, served by 4 distinct USPS-recognized cities.

Population moved from 3,751 to 3,218 from 2014 to 2024 — a -14.2% change. 2 ZIPs gained residents, 2 lost.

The county's wealthiest ZIP 50859 (Prescott, $76,875 median) and poorest ZIP 50857 (Nodaway, $63,500) are 17.2 miles apart — a 1.2× income gap across local geography.

Median home values vary 1.4× across this county — from $116,700 in 50841 (Corning) to $163,500 in 50859 (Prescott).

Density varies across the county — from 3 people/sq mi in 50857 (Nodaway) to 10 in 50841 (Corning).

Educational attainment ranges from 22.9% bachelor's+ in 50857 (Nodaway) to 27.1% in 50841 (Corning) — the breadth of educational profiles across the area.

Within Iowa, this is the #99 most populous of 99 counties and ranks #89 for median household income .

Weighted by population, the typical household earns about $68,553 across the county — reflecting what a typical resident sees, not a simple ZIP average.

26.1% of adults age 25+ hold a bachelor's degree or higher (627 of 2,405 reporting).

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

Stories about Adams County


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.

Corning

Population decline

Adams County lost 14.2% of residents between 2014 and 2024. ZIPs that shed the largest share:

Corning
-16.0%
2,785 → 2,340 residents

All ZIP Codes in Adams County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
50841CorningStandard2,340$66,875232.5-16.0%
50859PrescottStandard676$76,87579.31.8%
50857NodawayStandard156$63,50055.5-44.5%
50839CarbonStandard46$48,7500.6119.0%

Adjacent & Nearby Counties