Jefferson County, Wisconsin Zip Codes

Zip Code	City	Population
53538	Fort Atkinson	18,535
53094	Watertown	18,507
53549	Jefferson	9,902
53551	Lake Mills	9,417
53594	Waterloo	5,059
53038	Johnson Creek	4,323
53156	Palmyra	3,433
53036	Ixonia	3,140
53178	Sullivan	2,749
53137	Helenville	1,490

Population is the most recent figure from the U.S. Census Bureau's 2022 American Community Survey (ACS) 5-Year Estimates.