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 — CITY/IA/JEFFERSON

Jefferson ZIP code, Iowa

The ZIP code for Jefferson, IA is 50129, and its area code is 515.

USPS city name
1 ZIP code
Population
4,152
Area code
515
State
Iowa

Jefferson in numbers

About 4,152 people live in Jefferson, in 2,085 households. The median household income is $58,895 a year, 22% below the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $155,800 (25% below the Iowa median), and median gross rent is $754 a month. The median age is 53.6; 21.1% of adults 25 and over hold a bachelor's degree or higher (31.4% across Iowa); the average commute takes 22 minutes.

Population4,152Jefferson4,152
Households2,085Jefferson2,085
Median age53.6Jefferson53.6Iowa38.6US 38.9
Median household income$58,895Jefferson$58,895Iowa$75,059US $80,734
Median home value$155,800Jefferson$155,800Iowa$208,000US $332,700
Median gross rent$754Jefferson$754Iowa$972US $1,413
Bachelor's degree or higher21.1%Jefferson21.1%Iowa31.4%US 35.7%
Mean commute22.2 minJefferson22.2 minIowa19.8 minUS 26.4 min
Population density690 / sq miJefferson690 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Jefferson city. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Jefferson

ZIP codes with the USPS city name Jefferson
ZIP City Type Population Median income Median home
50129 Jefferson , IA Standard 5,014 $60,671 $166,100

Map of Jefferson ZIP codes

50129

The ZIP codes of Jefferson, IA, 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.

Towns near Jefferson

The nearest larger towns are Perry (7,985 people, 19 mi), Carroll (10,208 people, 25 mi) and Boone (12,424 people, 26 mi).

Towns near Jefferson
TownPopulationDistance
Perry 7,985 19.3 mi
Carroll 10,208 25.2 mi
Boone 12,424 26.1 mi

More nearby: every ZIP code in Greene County · Iowa ZIP codes

Cite this page

zipcodes.pro. “Jefferson, IA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ia/jefferson

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