Byron Post Office Hours


Retail Hours

Monday-Friday 9:30am - 12:30pm, 1:00pm - 4:30pm
Saturday 10:00am - 12:00pm
Sunday Closed

Bulk Mail Acceptance Hours

Monday-Friday 9:00am - 4:00pm
Saturday-Sunday Closed

Monday-Friday 9:30am - 12:15pm, 1:00pm - 4:30pm
Saturday 10:00am - 12:00pm
Sunday Closed

Lobby Hours

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

USPS Shipping Rate Calculator

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Daniel T Uemura (Postmaster) daniel.t.uemura@usps.gov
3852 Main St
Byron, CA 94514

The Byron Post Office is located in the state of California within Contra Costa County. This location serves 1,360 Byron residents with a median income of $52,031. It's estimated that approximately 2,171 packages pass through this post office each year.

Byron Post Office Location


Byron California Local Links