ZIP Codes of Franklin County, IA

Population & People
Population & People
Total Population
9,261
Household Income
Household Income
Median Income
$63,718
Housing
Housing
Total Housing Units
4,255
Business & Economy
Business & Economy
Total Businesses
250
Employment
Employment
Employment Rate
58.08%
Education
Education
Bachelor's Degree+
18.14%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 9 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:9 ZIP Codes (7 Standard, 2 PO Box, 0 Unique) [See All]
Area Code:641
Timezone:Central (GMT -06:00)
Local Time:11:53:09 PM
Population:9,261 [See All]
FIPS:19069
Land Area:393 sq mi
Water Area:0 sq mi
Coordinates:42.7422, -93.2973
Quick Link:
https://www.zip-codes.com/county/ia-franklin.asp
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Extreme geographic sprawl
The largest ZIP spans 2353× the smallest by area — 155.1 sq mi down to 0.07.
Extreme education divide
Bachelor's share ranges 3.0% to 53.4% across ZIPs — a 50-point gap.

Standout ZIPs in this County


Most Populous
Hampton · 5,450 people
58.8% of county total
Highest Income
Alexander · $76,250 median
1.2× county average
Largest Land Area
Hampton · 155.1 sq mi
Spans the most ground
Fastest Growth
Hampton · -3.8% (10-yr)
5,666 → 5,450 residents
Most Educated
Hampton · 17.7% bachelor's+
648 of 3,671 adults 25+

Things worth knowing about Franklin County


9,261 residents live across 9 ZIPs covering 393 sq mi, served by 9 distinct USPS-recognized cities.

Population moved from 9,498 to 9,124 from 2014 to 2024 — a -3.9% change. 4 ZIPs gained residents, 4 lost.

The county's wealthiest ZIP 50420 (Alexander, $76,250 median) and poorest ZIP 50227 (Popejoy, $38,611) are 15.1 miles apart — a 2.0× income gap across local geography.

Median home values vary 2.0× across this county — from $83,500 in 50227 (Popejoy) to $165,300 in 50475 (Sheffield).

Density varies 235× across the county — from 9 people/sq mi in 50420 (Alexander) to 2,079 in 50427 (Chapin).

Educational attainment ranges from 3.0% bachelor's+ in 50227 (Popejoy) to 53.4% in 50427 (Chapin) — the breadth of educational profiles across the area.

Within Iowa, this is the #79 most populous of 99 counties and ranks #91 for median household income .

Weighted by population, the typical household earns about $57,782 across the county — reflecting what a typical resident sees, not a simple ZIP average.

18.1% of adults age 25+ hold a bachelor's degree or higher (1,139 of 6,280 reporting).

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

All ZIP Codes in Franklin County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
50441HamptonStandard5,450$49,910155.1-3.8%
50475SheffieldStandard1,446$70,93890.3-20.7%
50452LatimerStandard946$66,25046.026.1%
50420AlexanderStandard473$76,25053.417.4%
50633GenevaStandard423$71,77545.92.2%
50431CoulterPO Box228$62,9170.9-34.3%
50427ChapinStandard137$73,0910.1
50227PopejoyStandard107$38,6111.3181.6%
50041BradfordPO Box510.3-10.5%

Adjacent & Nearby Counties