Mercedes Post Office

307 Starr St, Mercedes, TX 78570

Contact Numbers

Phone: 956-565-1272
Fax: 956-565-0567
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours

Lobby Hours
PO Box Access Available

Monday 24 hours
Tuesday 24 hours
Wednesday 24 hours
Thursday 24 hours
Friday 24 hours
Saturday 24 hours
Sunday 24 hours

Last Collection Times

Monday 4:15pm
Tuesday 4:15pm
Wednesday 4:15pm
Thursday 4:15pm
Friday 4:15pm
Saturday 4:15pm
Sunday Closed

Bulk Mail Acceptance Hours

Monday 8:30am - 3:00pm
Tuesday 8:30am - 3:00pm
Wednesday 8:30am - 3:00pm
Thursday 8:30am - 3:00pm
Friday 8:30am - 3:00pm
Saturday Closed
Sunday Closed

*This facility does not process US Passports applications or renewals. Check nearby locations below.

  • Bulk Mail Acceptance
  • Bulk Mail Account Balance
  • Bulk Mail New Permit
  • Burial Flags
  • Business Line
  • Business Reply Mail Account Balance
  • Business Reply Mail New Permit
  • Duck Stamps
  • General Delivery
  • Money Orders (Domestic)
  • Money Orders (Inquiry)
  • Money Orders (International)
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • Sure Money
  • Lot Parking

Visit our Links Page for Holiday Schedule, Change of Address, Hold Mail/Stop Delivery, PO Box rentals and fees, and Available Jobs.

*Please call to verify information. Is anything incorrect? Let us know here

Nearby Post Offices:

215 E Us Highway 281
3.2 miles away

109 N Border Ave
3.5 miles away

La Feria
201 W First St
3.5 miles away

Santa Maria
11175 Military Rd
4.1 miles away


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I can’t get Mercedes Post office to answer their phone! Calling for hours & never getting someone to pick up the phone is not acceptable.


Very disappointed. I asked for a hold when I went out of town. So I show up with my ID to pick up my mail and they tell me they already delivered on my end date. So I leave and get home and there’s mail. Ok then I’m waiting for a package and they say there’s still a hold. Wtf! Ugh


Worst run post office. The mailman is probably the laziest man in the valley and because it’s a government job they hold no accountability for their employees. DO YOUR JOB RIGHT OR WORK SOMEWHERE ELSE


Even after 12 years of living in the same home my mail keeps going to another address. I also get other people's mail. Sometimes I don't get my bills for months. Doesn't matter if you call the postmaster nothing is ever corrected. I finally had to call the head postmaster in McAllen, TX. Mercedes has gone through 3 different postmasters in my 12 years. Proves to show they are not grateful to have a job.


Post Master is delivering our mail to a totally different address. They need to be more careful. Luckily the recipient called us and we had to pick up our mail. Protech Security Systems - Mercedes


Terrible experience, rude lady! I'm a teacher and get out of work at 4:15, rushed over to post office to pick up family photos that they didn't deliver to my house, they're holding them at post
office, got there at 4:28, and lady at door says- "No sorry, we're closed". After all the rush to get there early, I get kicked out for being there one minute before closing
time. If I had her kid in my class, I know I wouldn't say "sorry kid, I can't read the last page of the book for you, times up." How rude of this employee at the Mercedes post


• Replied to Jacky

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