Mandi M Harden (Postmaster)
mandi.m.harden@usps.gov
106 W State St
Saint Johns, MI 48879
Saint Johns, MI 48879
The Saint Johns Post Office is located in the state of Michigan within Clinton County. This location serves 18,075 Saint Johns residents with a median income of $52,533. It's estimated that approximately 28,850 packages pass through this post office each year.