Brand Certified
United States Postal Service
2.5(226 reviews)
Certified by United States Postal Service • Jun 28, 2026
Business Details
420 N Twin Oaks Valley Rd, San Marcos, CA
92069, United States
Certified by United States Postal Service • Jun 28, 2026
(800) 275-8777
Certified by United States Postal Service • Jun 28, 2026
http://usps.com/postoffice
Certified by United States Postal Service • Jun 28, 2026
About
Certified by United States Postal Service • Jun 28, 2026
Post OfficeShipping ServiceCargo ServicePackaging Supply StoreLogistics ServiceMoney Order ServiceVisa and Passport OfficeUnited States Postal Service
Visit your local Post Office™ at 420 N Twin Oaks Valley Rd to find everything you need to send mail and ship packages. Explore our other products and services like money orders, Post Office™ boxes, passports, gift cards, and more
Location
Certified by United States Postal Service • Jun 28, 2026
United States Postal Service
420 N Twin Oaks Valley Rd, San Marcos, CA
92069, United States
Hours
Certified by United States Postal Service • Jun 28, 2026
Monday9:00 AM - 5:00 PM
Tuesday9:00 AM - 5:00 PM
Wednesday9:00 AM - 5:00 PM
Thursday9:00 AM - 5:00 PM
Friday9:00 AM - 5:00 PM
Saturday10:00 AM - 4:00 PM
SundayClosed
Products & Services
1 list · 35 items
Explore offerings from United States Postal Service on 420 N Twin Oaks Valley Rd in San Marcos, with popular services available at this location.
Reviews
2.5
226 reviews
5 stars
70
4 stars
8
3 stars
11
2 stars
12
1 star
125
- NHNancy Hayssen5 days ago3.0Terrible attitude. Definition of a disgruntled postal worker. At least the line was short & quick!
- RSRamona StefaniJun 13, 20261.0Visited this USPS location on June 13 at around 2:00 PM. The post office was completely empty except for one customer who was struggling to use the self-service kiosk. The employee working the counter, an older woman, refused to scan my prepaid package and directed me to the self-service machine instead. After waiting about 10 minutes while the other customer continued having difficulties with the kiosk, I returned to the counter and politely asked if she could scan my package. Despite there being no line and no apparent workload, she again refused. During this time, she appeared to be opening envelopes behind the counter rather than assisting customers. When I asked for her name, she refused to provide it and instead asked for mine. I left disappointed by the lack of customer service and unwillingness to help, especially when the lobby was virtually empty. USPS customers deserve courteous service and reasonable assistance, particularly for a simple package acceptance scan. This experience was frustrating and unprofessional. I didn’t know USPS employs Karen’s too.
- AGAlejandra GonzalezJun 9, 20261.0My husband went in today this morning to send something as he was being helped he overheard the white male worker engaging and agreeing with a customer who was making derogatory comments about Mexicans. As a Mexican American this made him very uncomfortable. Postal staff should not be engaging in any type of political and or agreeing with derogatory comments about someone’s ethnicity !
- LLLizetteMay 14, 20265.0I never write review for anything but i just have to shout out Steven!. He is the the most paitient and loves to do his job. I applied for my passport and everything went smooth, I was outta there in 10 minutes. This is now my go to post office for passport services, way better than oceanside post office. I recommend coming prepared and double checking everthing before coming. and respecting other people appointment times.
- LDLinda DMay 14, 20265.0The staff is very helpful here. They also are more friendly then in days of old. I was in and out in a few minutes
Frequently Asked Questions About United States Postal Service
Can I get a passport application at this Post Office?
Yes, Thousands of Post Offices™ accept first-time passport applications for the U.S. Department of State. Most of those locations can also take your passport photo. Please complete and print your passport application form before you apply.
Is an appointment needed for passport services?
Most Post Offices that offer passport services have set hours, and you'll need to schedule an appointment using our online scheduler. We also offer limited Passport walk-in hours at select locations.
Does this location take the photo needed for passports?
For first-time passport and photo services, please make an appointment using our online scheduler.
What is the cost to take a passport photo?
The current fee for a passport photo at USPS is $15.
When does this location do walk-in passports?
We offer limited Passport walk-in hours at select locations.
Can I get a PO Box online?
Yes, you can search for available PO Boxes and reserve one online at https://www.usps.com/manage/po-boxes.htm. The process is quick and secure, and you'll receive instructions for completing your setup in person.
How much is a small PO Box?
PO Box prices vary by location. You can check exact pricing for your area by visiting https://www.usps.com/manage/po-boxes.htm and entering your ZIP Code.
Can you get to the PO Boxes in the lobby after hours?
Most USPS locations offer 24/7 access to PO Boxes in the lobby. Access hours may vary by location, so check with your local Post Office for specific lobby hours.
How can I get a PO Box?
You can apply for a PO Box online or in person at your local Post Office. Just bring two valid forms of ID and your completed application if applying in person. To start online, visit https://www.usps.com/manage/po-boxes.htm.
What time can I check my PO Box weekly and on weekends?
You can check your PO Box during lobby hours, which often include extended hours or 24/7 access. Weekend access may vary. Check with your local Post Office for exact times.
What services can I find at the United States Postal Service located at 420 N Twin Oaks Valley Rd?
You can send mail, ship packages, purchase money orders, rent Post Office™ boxes, apply for passports, buy gift cards, and more at this location.
Can I apply for a U.S. passport at this Post Office?
Yes, this Post Office accepts first-time passport applications and can take passport photos with an appointment.
Do I need an appointment to use passport services at this location?
Most passport services require an appointment using the online scheduler, although limited walk-in hours are available at select locations.
What are the operating hours of the United States Postal Service in San Marcos, CA?
The Post Office is open Monday to Friday from 9:00 AM to 5:00 PM, Saturday from 10:00 AM to 4:00 PM, and closed on Sundays.
How can I reserve a PO Box at this Post Office?
You can search and reserve a PO Box online, then complete your setup in person at the Post Office with two valid forms of ID.
Is there 24/7 access to PO Boxes at the San Marcos Post Office?
Most USPS locations offer 24/7 PO Box lobby access, but hours may vary. Check with your local Post Office for details.
Where is the nearest convenience store to the United States Postal Service at 420 N Twin Oaks Valley Rd?
7-Eleven, a convenience store, gas station, and liquor store, is located nearby, providing quick access for snacks or fuel before or after your visit to the Post Office.
Are there any local dining options near the United States Postal Service in San Marcos?
Yes, Papa Johns Pizza, a fast food and pizza restaurant, is nearby if you want to grab a meal before or after visiting the Post Office.
Can I visit a park near the United States Postal Service in San Marcos?
Richmar Park is located close to the Post Office and offers outdoor activities you might enjoy before or after your postal visit.
Brand Certified Facts from United States Postal Service
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