Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — STATE/IA/COUNTY/FRANKLIN

Franklin County, IA ZIP codes

There are 11 ZIP codes in Franklin County, IA, in 11 towns, from 50041 to 50633. The largest are 50441 (Hampton), 50601 (Ackley) and 50475 (Sheffield). 3 more cross into it from neighbouring counties: 50126, 50006 and 50071.

The county seat is Hampton.

ZIP codes
11
Partly in it
3 more
Towns
11
County seat
Hampton
County FIPS
19069
State
Iowa
Population
9,956
Median household income
$59,894
Land area
582 sq mi

Franklin County ZIP codes by town

Hampton (county seat)
50441

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.

ZIP codes partly in Franklin County

These ZIP codes lie mostly in a neighbouring county but each cover a twentieth or more of Franklin County.

Map of Franklin County ZIP codes

5004150227504205042750431504415045250475506015060550633

The ZIP codes of Franklin 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.

Franklin County in numbers

About 9,956 people live in Franklin County, in 4,198 households, the 73rd most populous of Iowa's 99 counties. The median household income is $59,894 a year, 20% below the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $124,100 (40% below the Iowa median), and median gross rent is $696 a month. The median age is 42.7; 19.4% of adults 25 and over hold a bachelor's degree or higher (31.4% across Iowa); the average commute takes 21 minutes.

Population9,956Franklin9,956
Households4,198Franklin4,198
Median age42.7Franklin42.7Iowa38.6US 38.9
Median household income$59,894Franklin$59,894Iowa$75,059US $80,734
Median home value$124,100Franklin$124,100Iowa$208,000US $332,700
Median gross rent$696Franklin$696Iowa$972US $1,413
Bachelor's degree or higher19.4%Franklin19.4%Iowa31.4%US 35.7%
Mean commute20.5 minFranklin20.5 minIowa19.8 minUS 26.4 min
Population density17 / sq miFranklin17 / 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 Franklin County

Largest towns in Franklin County
TownZIP codesPopulation
Hampton 1 4,306
Ackley 1 1,482
Sheffield 1 1,053
Latimer 1 681
Alexander 1 245
Coulter 1 228
Bradford 1 178
Geneva 1 152
Chapin 1 137
Popejoy 1 109
Aredale 1 48

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 Franklin County.

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

Every ZIP code in Franklin County, with figures

ZIP codes in Franklin County
ZIP City Type Population Median income Median home
50041 Bradford , IA Standard 51 — —
50227 Popejoy , IA Standard 107 $38,611 $83,500
50420 Alexander , IA Standard 473 $76,250 $101,600
50427 Chapin , IA Standard 137 $73,091 $94,000
50431 Coulter , IA Standard 228 $62,917 $90,000
50441 Hampton , IA Standard 5,450 $49,910 $127,100
50452 Latimer , IA Standard 946 $66,250 $120,200
50475 Sheffield , IA Standard 1,446 $70,938 $165,300
50601 Ackley , IA Standard 2,299 $66,250 $127,200
50605 Aredale , IA Standard 63 $23,125 $69,400
50633 Geneva , IA Standard 423 $71,775 $96,300

Cite this page

zipcodes.pro. “Franklin County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/ia/county/franklin

Underlying data is public domain or openly licensed — sources, vintages and licences.