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Jeanne Marie Mihills (Postmaster)
jeanne.m.mihills@usps.gov
340 S Washington St
Constantine, MI 49042
Constantine, MI 49042
The Constantine Post Office is located in the state of Michigan within St Joseph County. This location serves 4,892 Constantine residents with a median income of $42,399. It's estimated that approximately 7,808 packages pass through this post office each year.