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Irwin Post Office Hours

Retail Hours

Monday-Friday 8:30am - 4:30pm
Saturday 8:30am - 12:00pm
Sunday Closed

Bulk Mail Acceptance Hours

Monday-Friday 9:00am - 3:00pm
Saturday-Sunday Closed

Monday-Friday 8:30am - 4:30pm
Saturday 8:00am - 12:00pm
Sunday Closed

Lobby Hours

Monday-Sunday 12:01am - 11:59pm

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Mark S Dowd (Postmaster) mark.s.dowd@usps.gov
140 Main St
Irwin, PA 15642

The Irwin Post Office is located in the state of Pennsylvania within Westmoreland County. This location serves 45,286 Irwin residents with a median income of $65,620. It's estimated that approximately 72,282 packages pass through this post office each year.

Irwin Post Office Location

Irwin Pennsylvania Local Links