Janesville, WI zip codes
Janesville, Wisconsin has 4 zip codes (3 residential, 1 PO box or single-organization). Most of it is in Rock County. Together these zip codes are home to about 74K people.
Zip codes
4
Population
74K
All zips combined
Largest zip
53546
29,867 residents
Income range
$74K–$77K
Median by zip