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

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zipcodes.pro — CITY/IA/JANESVILLE

Janesville ZIP code, Iowa

The ZIP code for Janesville, IA is 50647, and its area code is 319.

USPS city name
1 ZIP code
Overlapping the city
1 more
Population
917
Area code
319
State
Iowa

Mail addressed to Janesville uses the ZIP code above. 1 more ZIP code covers part of the city but is addressed as somewhere else; they are listed separately below.

Janesville in numbers

About 917 people live in Janesville, in 361 households. The median household income is $103,542 a year, 38% above the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $221,700 (7% above the Iowa median), and median gross rent is $717 a month. The median age is 47.0; 28.9% of adults 25 and over hold a bachelor's degree or higher (31.4% across Iowa); the average commute takes 20 minutes.

Population917Janesville917
Households361Janesville361
Median age47.0Janesville47.0Iowa38.6US 38.9
Median household income$103,542Janesville$103,542Iowa$75,059US $80,734
Median home value$221,700Janesville$221,700Iowa$208,000US $332,700
Median gross rent$717Janesville$717Iowa$972US $1,413
Bachelor's degree or higher28.9%Janesville28.9%Iowa31.4%US 35.7%
Mean commute20.1 minJanesville20.1 minIowa19.8 minUS 26.4 min
Population density660 / sq miJanesville660 / sq mi

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

ZIP codes addressed as Janesville

ZIP codes with the USPS city name Janesville
ZIP City Type Population Median income Median home
50647 Janesville , IA Standard 1,978 $104,063 $314,200

Other ZIP codes overlapping Janesville

These ZIP codes cover part of Janesville but are addressed as somewhere else.

ZIP codes overlapping Janesville
ZIP City Type Population Median income Median home
50677 Waverly , IA Standard 12,673 $85,633 $232,800

Map of Janesville ZIP codes

50647

The ZIP codes of Janesville, 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 Janesville

The nearest larger towns are Waverly (10,494 people, 5.3 mi), Denver (2,379 people, 6.7 mi) and Shell Rock (1,625 people, 7.6 mi).

Towns near Janesville
TownPopulationDistance
Waverly 10,494 5.3 mi
Cedar Falls 40,888 8.8 mi
Waterloo 67,008 12.0 mi
Hudson 2,699 14.6 mi
Evansdale 4,518 15.9 mi
Jesup 2,561 23.4 mi
Grundy Center 2,809 25.1 mi
Oelwein 5,834 28.0 mi
New Hampton 3,453 29.3 mi

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

Cite this page

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

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