Marcy Zellmer (Postmaster)
marcella.a.zellmer@usps.gov
241 W Madison St
Waterloo, WI 53594
Waterloo, WI 53594
The Waterloo Post Office is located in the state of Wisconsin within Jefferson County. This location serves 5,144 Waterloo residents with a median income of $52,394. It's estimated that approximately 8,210 packages pass through this post office each year.