Short answer: FedEx cannot deliver directly to a USPS PO Box, because only the Postal Service has access to those boxes. But there are two reliable ways around it. You can use USPS Street Addressing, a free opt-in service that lets you receive FedEx and UPS packages at your PO Box using the Post Office’s street address, or you can ship on a FedEx service that hands the last leg to USPS. There are also better alternatives if you frequently order from carriers that do not serve boxes.
Here is exactly how PO Box delivery works with FedEx in 2026, the correct way to address it, the restrictions, and the alternatives worth knowing.
Does FedEx deliver to PO Boxes?
Not directly. A USPS PO Box sits inside a Post Office, and only USPS employees can open and fill those boxes. An outside carrier like FedEx or UPS legally cannot walk into the Post Office and drop a package into your box. That is why entering a PO Box on a checkout form at Amazon, eBay, or most retailers triggers a warning that a PO Box is not a valid address for that shipping method.
This is the same limitation UPS has, for the same reason, which we cover in does UPS deliver to PO Boxes. So if your only address is a PO Box, you need one of the workarounds below rather than a standard FedEx label.
The real solution: USPS Street Addressing
The cleanest way to receive FedEx packages at your PO Box is a free USPS service called Street Addressing. When you opt in, USPS lets you use the Post Office’s own street address followed by your box number as if it were an apartment number. A package addressed that way arrives at the Post Office from FedEx, and USPS places it in your box (or holds a larger parcel at the counter for you).
The format looks like this. Instead of:
- PO Box 627
you write the Post Office’s street address with your box number as the unit:
- 3075 Main St NW #627
Two things make this work smoothly. First, you generally need to enroll in Street Addressing with your local Post Office so they accept carrier deliveries to your box, and it is free to do. Second, use the actual street address of the specific Post Office where your box is located, not a guess. Once set up, this is the most dependable way to get FedEx and UPS shipments to a PO Box, and it is a legitimate USPS service rather than a trick.
FedEx services that reach a PO Box
The other route is to ship on a FedEx service where USPS completes the final delivery. FedEx Ground Economy, the economy residential service that was formerly called FedEx SmartPost, injects packages into the USPS network for the last mile, so those packages can land in a PO Box because USPS makes the final drop.
The catch is that you usually do not get to pick this at retail checkout, it is a service the shipper selects, and it is aimed at lightweight, lower-cost shipments with slower transit times. So while it is a real path to a PO Box, Street Addressing is the option you have direct control over as the recipient.
Restrictions to know
PO Box delivery through FedEx comes with limits worth knowing before you rely on it:
- Signature service is not available for PO Box deliveries, since USPS handles the final placement.
- Hazardous materials cannot be sent to a PO Box.
- Evening and appointment delivery do not apply, because the package is completed by USPS on its normal schedule.
- Larger parcels may be held at the counter rather than placed in the box if they do not fit, and you pick them up with your box key or ID.
Better alternatives if you order a lot
If you regularly buy from sellers that ship FedEx or UPS, a few options beat wrestling with PO Box formatting every time:
- FedEx Hold at Location. Have packages sent to a nearby FedEx location and pick them up on your schedule. It keeps parcels off your porch and out of a box that may be too small. You can set this up through free FedEx Delivery Manager, which also lets you redirect and get alerts.
- Use a street address with delivery instructions. If you have a physical address, using it with clear delivery instructions is the simplest fix, and Delivery Manager lets you tell the driver exactly where to leave the box.
- A private mailbox. Private mailbox services provide a real street address that any carrier can deliver to, which sidesteps the PO Box limitation entirely, though they charge a monthly fee.
For everyday timing questions once your package is on its way, our guides on how late FedEx delivers and whether FedEx delivers on Saturday cover when to expect it. And if you specifically need to send certified mail to a box, that is a USPS matter covered in sending certified mail to a PO Box.
Frequently asked questions
Does FedEx deliver to PO Boxes?
Not directly, because only USPS can access PO Boxes. You can receive FedEx packages at a PO Box by enrolling in free USPS Street Addressing and using the Post Office street address with your box number, or by shipping on a service like FedEx Ground Economy where USPS completes delivery.
How do I address a FedEx package to a PO Box?
Use USPS Street Addressing: write the Post Office street address followed by your box number as a unit, for example 3075 Main St NW #627, rather than PO Box 627. Enroll with your local Post Office first so they accept carrier deliveries to your box.
Is Street Addressing free?
Yes. USPS Street Addressing is a free opt-in service for PO Box holders that lets you receive packages from FedEx, UPS, and other carriers at your box using the Post Office street address.
Can I require a signature for a FedEx PO Box delivery?
No. Signature service is not available for PO Box deliveries because USPS handles the final placement into the box. If you need a signature, use a physical address or FedEx Hold at Location instead.
What is FedEx Ground Economy?
FedEx Ground Economy is the economy residential service formerly known as FedEx SmartPost. It uses the USPS network for the final delivery leg, which is why packages on it can reach a PO Box, though it is a slower, shipper-selected service.
Does UPS deliver to PO Boxes?
No, UPS also cannot deliver directly to a USPS PO Box, for the same access reason as FedEx. The same Street Addressing workaround applies. See our full guide on UPS and PO Boxes for details.
The bottom line
FedEx cannot open a PO Box, so it does not deliver to one directly, but that does not mean you are stuck. Enroll in free USPS Street Addressing and address packages to the Post Office street address with your box number, and FedEx shipments will reach you through USPS. For heavier or signature-required items, a physical address, FedEx Hold at Location, or a private mailbox are cleaner long-term fixes. Set it up once and receiving FedEx packages at your box becomes routine.
