A locked window stops one transaction. It does not stop a parcel that already carries postage.
Seven clocks, one building
Pull up any branch on the USPS location finder and the detail page does not print an opening time. It prints a stack of blocks, each with its own weekday, Saturday and Sunday rows. Somebody asking whether the Post Office is open is usually reading the wrong one of the seven.
| Block USPS prints | What it governs | Who needs it |
|---|---|---|
| Lobby Hours | When the outer door is unlocked | Anyone using a kiosk or reaching a PO Box outside staffed hours |
| Retail Hours | When a staffed window will sell postage and take a parcel over the counter | The actual answer to “is it open” |
| Last Collection Hours | The hour a parcel still makes that day's dispatch out of that building | Anyone who cares which date the tracking starts on |
| Passport Appointment Hours | Passport acceptance appointments | Passport applicants, and nobody else |
| Passport Photo | When a photo can be taken on site | Passport applicants without a photo |
| PO Box Access | When the boxes themselves can be reached | Box holders |
| PO Box Delivery Hours | The hour mail is actually in the boxes | Box holders deciding when to make the trip |
Lobby and retail are the pair people conflate. USPS draws the line itself in its locator glossary: a Post Office “is staffed by a Postal Service employee and has window service hours”, while “many Post Offices have open, after-hour lobbies with self-service kiosks and PO Box access” (usps.com/locator/glossary.htm, read 2026-07-29). Unlocked and staffed are two different states of the same door.
What is set nationally, what is set by your branch
National: the eleven closed dates
Holiday closures are the only calendar that applies to every branch at once, and the Postal Service publishes the list a year at a time. Our transcription of the 2026 dates, and the closure wording attached to them, sits on the USPS holidays page rather than being repeated here.
National: the pickup week
The scheduling tool states plainly that “you can schedule pickups Monday-Saturday”, and lists collection during regular mail delivery at no charge (tools.usps.com/schedule-pickup-steps.htm, read 2026-07-29). That shape does not change from town to town.
Local: everything else
Window hours, lobby hours, the last collection time and box access are all per location. Even PO Box access, which USPS describes as round the clock at most sites, carries the caveat that “hours vary by Post Office location” (usps.com/manage/po-boxes.htm, read 2026-07-29).
The practical consequence: a phone number or a general opening time somebody gives you for “the Post Office” is worth nothing. The branch page is the only source that binds, and the row you want on it is Retail Hours if you need a person, Last Collection Hours if you only need the parcel to leave.
What still works with the counter shut
A closed window blocks exactly one thing: buying postage from a human. Five routes around it stay open, and four of them are cheaper than the counter anyway.
The kiosk in the lobby
USPS describes them in its glossary: “most kiosks are in Post Office lobbies and offer many of the services available at the full-service Post Office counter” (read 2026-07-29). What a machine will not do is reach a commercial price list, which is the trade-off our kiosk guide puts numbers on.
Your own letter carrier
A parcel with postage already on it can be handed over on the route or left where your carrier collects. No counter, no queue, no closing time to beat other than the route itself.
A booked pickup
USPS takes pickup requests Monday through Saturday and collects during the normal delivery round at no cost. Our pickup page covers what qualifies and where to leave the box.
A collection box
The glossary defines them as “freestanding mailboxes such as the familiar USPS Blue Box, special white mailboxes for prepaid Priority Mail Express items” (read 2026-07-29). Size is the limit, and each box carries its own posted collection time.
Somebody else's counter
Contract Postal Units sit “within existing businesses” and provide “a full range of USPS retail products and services” (glossary, read 2026-07-29). Their hours belong to the host business, which is why one can be open on an evening when the branch down the road is dark. Which counter to pick sorts them out.
The label you print at home
Postage bought online is valid whether the branch is open or not. The parcel simply waits for its first scan, and the transit window starts from acceptance rather than from payment.
Two boxes we quoted this morning
If the reason you are checking hours is a parcel sitting by the door, the useful number is what that parcel costs without the trip. Both boxes below were priced through our calculator on 2026-07-29 out of Berkeley Heights, NJ to downtown St. Louis. Prices shown are what a customer pays, already carrying our charge alongside the carrier's.
| Carrier | Service | Price | Window returned |
|---|---|---|---|
| USPS | Ground Advantage | $8.48 | 4-5 business days |
| UPS | Ground Saver | $12.07 | none returned |
| FedEx | Ground Economy | $12.42 | 5-6 business days |
| UPS | Ground | $12.47 | 5-6 business days |
| USPS | Priority Mail | $18.99 | 4-5 business days |
| Carrier | Service | Price | Window returned |
|---|---|---|---|
| UPS | Ground Saver | $16.23 | none returned |
| USPS | Ground Advantage | $16.33 | 4-5 business days |
| FedEx | Ground Economy | $16.34 | 5-6 business days |
| UPS | Ground | $20.12 | 5-6 business days |
| UPS | 3 Day Select | $24.36 | 5-6 business days |
Two of those rows have a counter figure to sit beside them, because USPS publishes its own retail price for the same parcel. The shoebox on Ground Advantage: $8.48 online against a $14.95 retail price. The 9 lb carton on the same service: $16.33 against $21.40 retail. FedEx published $17.96 and $21.06 as its retail figures for the two Ground Economy rows. Those gaps are the reason the trip is rarely the cheap option.
One row runs the other way and is worth saying out loud: USPS Priority Mail on the shoebox came back at $18.99 through us against a $18.05 USPS retail price. On a light parcel moving on that particular service, the counter wins. Nothing about a comparison is useful if it only ever points one direction.
Reading your own branch page in a minute
1. Look up the building, not the city
The USPS location finder takes a ZIP or an address and returns the specific branch. Two Post Offices four miles apart routinely keep different Saturday hours.
2. Read Retail Hours first
That block is the staffed window. If it is dark for today, no other block on the page changes that, whatever the lobby row says.
3. Then read Last Collection Hours
Arriving before the window closes but after the last collection means the parcel sleeps there. Cutoff times goes into how that hour interacts with the transit window on your label.
4. Check the date against the holiday list
A branch page shows a normal week. It will not tell you that this particular Thursday is one of the eleven observed dates, so cross-check the 2026 calendar.
5. Decide whether you need the counter at all
Postage, weight and dimensions can all be settled at your kitchen table. The counter is only unavoidable for things that need a signature from a clerk, such as registered mail or a passport appointment.
6. Separate the counter from the route
A closed window and a paused delivery route are different events. Whether mail moves on a given Saturday or Sunday is answered on Saturday delivery and Sunday delivery.
Common questions
Is USPS open today?
That depends on your branch and on the date, because retail window hours are published location by location rather than nationally. Two things are set centrally: the eleven dates the Postal Service observes as holidays, when counters shut, and the Monday through Saturday shape of its Package Pickup scheduling.
Why does one Post Office publish seven sets of hours?
Because the building does seven separate jobs. A USPS location page carries its own block for Lobby Hours, Retail Hours, Last Collection Hours, Passport Appointment Hours, Passport Photo, PO Box Access and PO Box Delivery Hours, each with weekday, Saturday and Sunday rows.
What time does the Post Office close?
Read the Retail Hours row rather than the Lobby Hours row. A lobby can stay unlocked long after the staffed window shuts, and the last collection hour is a third number again — it is the moment a parcel still catches that day's dispatch out of that building.
Is the Post Office open on Sunday?
Each of the seven hours blocks on a USPS location page carries a Sunday row, so your branch prints its own answer there. Alongside it sits one national fact: USPS schedules Package Pickup Monday through Saturday.
Can I send a package while the counter is closed?
Yes, and on most boxes it costs less than the counter would. Buy the label at home, then hand the parcel to your letter carrier, use a self-service kiosk in an after-hour lobby, drop it in a collection box if it fits, or book a pickup for the next delivery day.
Where these rules come from
- USPS, Find USPS Locations: Glossary — window service hours, after-hour lobbies, self-service kiosks, Contract Postal Units and collection boxes. Read 2026-07-29.
- USPS, Post Office location detail page — the seven hours blocks and their weekday, Saturday and Sunday rows. Read 2026-07-29.
- USPS, PO Boxes — round-the-clock box access at most sites, with hours varying by location. Read 2026-07-29.
- USPS, Schedule a Pickup — pickups available Monday through Saturday, collection during regular mail delivery at no charge. Read 2026-07-29.
Branch schedules change at short notice, and a temporary closure for staffing or a facility problem will show on the location page before it shows anywhere else. This page explains how the hours are structured; the branch page holds the times themselves.