United States – Postal Service

Who runs the postal service in the United States, and who are the main providers?

The United States Postal Service is an independent federal establishment with a statutory mandate to serve every community in the country through the dependable, affordable delivery of mail and packages. Its legal status places it in a category of its own: while it was created by the federal government, it does not receive direct taxpayer funding for its day-to-day operations — unlike fully nationalised carriers found in some other countries, or partially state-owned operators such as Australia Post.

USPS is required to be financially self-sustaining, covering its costs through the sale of postage, shipping products, and related services rather than through government appropriations. Governance is provided by a bipartisan Board of Governors, while pricing decisions and performance oversight fall under the remit of the independent Postal Regulatory Commission (PRC).

Under its long-term Delivering for America transformation programme, the Postal Service is working to modernise infrastructure, achieve lasting financial stability, and raise service performance across all mail and shipping categories — all while preserving its reputation as one of the most trusted institutions in American public life.

The US postal market is structured differently from the heavily regulated monopolies seen in parts of Europe. USPS retains an exclusive statutory right to deliver first-class letters and to access residential mailboxes, but the parcel and express delivery market is open to private competition. FedEx, UPS, and DHL are the principal alternatives, and Amazon Logistics has emerged as a major last-mile delivery player, mainly handling shipments within its own retail ecosystem.

With over 30,000 retail locations spread across the country, USPS offers unmatched physical accessibility for everyday postal needs. This footprint is especially significant in smaller towns and rural communities, where private courier companies often maintain no retail presence at all.

How fast and reliable is postal delivery in the United States?

USPS provides a range of domestic service tiers, each pitched at a different combination of speed and cost. Its fastest option, Priority Mail Express, operates seven days a week throughout the year (with limited exceptions), promising delivery within 1–3 business days to most US and PO Box addresses and backed by a money-back guarantee if that window is missed.

Priority Mail — described by USPS as its most popular shipping service — targets delivery in 2–3 days, with the actual timeframe depending on where the item originates and where it is headed. For heavier shipments or those where speed is less critical, USPS Ground Advantage generally takes between 2 and 5 business days, with deliveries to more distant shipping zones potentially stretching to 8 days. It handles a wide variety of package sizes and is well suited to non-urgent domestic shipping.

First-Class Mail covers standard letters and lightweight parcels. Current service standards cap First-Class Mail delivery at no more than 5 days, and in practice the majority of items travel shorter distances and arrive considerably faster — roughly two-thirds of First-Class mail is delivered within three days.

Looking at overall network performance, USPS reported an average delivery time of 2.6 days for mailpieces and packages across the country in late 2023. The Delivering for America plan sets an ambition to achieve on-time delivery rates at or above 95 percent across all product categories once its full programme of improvements is in place.

That said, on-time performance remains a work in progress. In FY 2024, punctuality for Single-Piece Letters and Postcards slipped compared with FY 2023 results. There is also meaningful geographic variation: customers located near major USPS regional processing facilities tend to see shorter transit times, while those in more isolated rural areas may experience longer delivery windows — even though those windows still fall within published service standards.

For mail crossing international borders, USPS works in partnership with destination countries’ domestic postal networks to complete final delivery. Services range from economy options such as First-Class Package International to faster offerings like Priority Mail Express International. Delivery times vary considerably by country and are subject to customs clearance at the receiving end. For the most current estimates, visit usps.com, since conditions shift regularly.

Tracking is automatically included with most USPS services (with the exception of standard First-Class Mail letters), and supplementary insurance or signature confirmation can be added. For Priority Mail and Ground Advantage shipments in particular, real-time scan updates give senders and recipients a clear view of a parcel’s progress through the network.

What additional services are available at post offices in the United States?

US post offices provide considerably more than a counter for buying stamps or handing over parcels. The breadth of services on offer — many standardised nationally, others varying by location size and staffing levels — makes the local post office an important community resource, particularly outside major urban centres.

• Passport applications: A large number of Post Office locations are authorised to accept first-time passport applications, applications for minors, and cases where renewal by mail is not permitted. For expats managing documentation needs, this is a practical convenience. Appointments can be booked through the USPS Retail Customer Appointment Scheduler at usps.com.
• PO Boxes: Lockable private mailboxes are available for rent at most post offices in a range of sizes, with annual fees that differ by location and box dimensions. They provide a consistent, secure mailing address — particularly handy for expats who are between homes or living somewhere with uncertain home delivery.
• Money orders: USPS issues both domestic and international money orders, which are broadly accepted as a safe payment method and are especially useful for people who have not yet set up a US bank account.
• Shipping supplies: Free Priority Mail and Priority Mail Express branded boxes, envelopes, and packing tape are stocked at post office counters and can also be ordered online for delivery to your door.
• Government forms and documents: Some post offices hold a selection of government forms and can assist with certain documentation requirements, though the range of services available varies from one location to the next.
• Philatelic products: Commemorative stamps and other collectors’ items can be purchased through the Postal Store at usps.com, by telephone at 844-737-7826, via the USA Philatelic catalogue by mail, or at select post office branches nationwide.
• Click-N-Ship and online tools: Through the USPS website, customers can print prepaid postage labels, arrange free package pickups, look up ZIP codes, calculate shipping costs, and track parcels — all without needing to visit a post office in person.

One distinction worth noting for expats from certain countries: USPS does not offer retail banking products in the manner of operators such as La Poste in France or Poste Italiane. Financial services are confined to money orders and prepaid debit cards available at selected locations — there is no postal bank account equivalent.

Does the postal service deliver to every address in the United States, and what happens if it doesn’t?

USPS operates under a universal service obligation that legally requires it to deliver mail and packages to all 169 million addresses across the country, six days a week and often seven. This obligation sets USPS apart from commercial carriers, which serve only the destinations they judge to be commercially viable.

For the vast majority of urban and suburban properties, delivery arrives directly at a home mailbox or apartment letterbox without complication. In very remote or sparsely populated areas, however, the logistics of delivery may differ. Cluster box units (CBUs) — centralised mailbox installations shared among a group of nearby households — are commonly used on rural routes where door-to-door delivery is impractical. Residents in these areas collect their mail from a shared unit rather than from a box at their front door.

Expats relocating to rural locations should verify the delivery arrangement at their specific address in advance. Where standard home delivery is unavailable, the following options exist:

• PO Boxes: Lockable boxes rented at the local post office, available in various sizes and at fees that vary by site and box size. Current pricing is available at usps.com.
• General Delivery: A free, short-term arrangement through which mail is addressed to a named individual at a particular post office and held there for collection — useful during moves or in areas without a settled postal address.
• Caller Service: Offered at some larger post offices, this allows regular customers to collect their mail directly from the post office without needing to rent a PO Box.

US territories — including Puerto Rico, Guam, the US Virgin Islands, American Samoa, and the Northern Mariana Islands — are served by USPS and use the same domestic postage rate structure, although transit times to these locations tend to run longer than to the contiguous 48 states. Military mail addresses (APO, FPO, and DPO) are likewise served by USPS at domestic rates.

How do you write a postal address in the United States?

US postal addresses follow a clear, standardised layout. Formatting an address correctly is more important than it might seem: one of the most frequent causes of mail delays or failed deliveries is an address that departs from the expected structure. The US format is compact compared with systems in some other countries that require a county, prefecture, or postcode on its own line.

The correct sequence of lines is:

1. Recipient name (with company name on a separate line above if relevant)
2. Street number and street name, plus apartment or unit number where applicable
3. City name, two-letter state abbreviation, and ZIP code — all together on a single line
4. Country name (included only when sending from outside the United States)

A typical address written out in full looks like this:

State abbreviations are always two uppercase letters — CA for California, NY for New York, TX for Texas, FL for Florida, and so on. While writing out the full state name is technically acceptable, USPS’s automated sorting equipment is optimised for the two-letter code. The ZIP code belongs at the end of the city and state line, not on a separate line below it. Common errors include placing the ZIP code on its own line, omitting the state entirely, or writing only a city name — which can create ambiguity given that many town names are repeated across multiple states.

How do you find or look up a ZIP code in the United States?

The ZIP (Zone Improvement Plan) code is the American equivalent of a postcode and has been part of the postal system since its introduction in 1963. A standard ZIP code is five digits long — for instance, 90210 identifies Beverly Hills in California, while 10001 covers a section of Manhattan in New York City. There is also an extended version called ZIP+4, which appends a hyphen and four additional digits to narrow the delivery area down to a specific block, building cluster, or delivery segment — for example, 10001-2345. The extended code assists automated sorting but is optional for most everyday correspondence.

ZIP codes define delivery areas rather than individual streets or buildings. In a dense city neighbourhood, one ZIP code might span only a few blocks; in a sparsely populated rural county, a single ZIP code could cover hundreds of square miles. Some institutions of sufficient scale — large federal agencies, major universities — are assigned their own dedicated ZIP codes.

The most straightforward way to find a ZIP code is through the free ZIP Code Lookup tool on the USPS website at usps.com, found under the “Quick Tools” menu. You can search by street address, by city and state, or by organisation name, and the tool returns both the five-digit ZIP and the full ZIP+4 where available. The USPS tool is the authoritative reference and is the safest choice when accuracy matters.

Unlike the alphanumeric postcode formats used in Canada or the United Kingdom, US ZIP codes consist entirely of numbers — no letters appear anywhere in the code. Every US address, including those in territories, carries a ZIP code, so there are no unpostcoded areas as sometimes found elsewhere. For military mail, dedicated ZIP codes in the 09xxx–098xx and 340xx ranges are used for APO, FPO, and DPO addresses.

What should expats know about receiving parcels and international mail in the United States?

If a parcel cannot be left at your address — because a signature is required and no one is home, for example — the carrier will leave a delivery notice (typically PS Form 3849) in your letterbox explaining your options. You can use this notice to schedule a redelivery online, through the USPS app, or by phone, or to arrange collection from your local post office. Redeliveries can usually be booked at no cost at usps.com. Parcels awaiting collection are held at the post office for 15 calendar days before being returned to the sender.

USPS also provides Informed Delivery, a free service that dispatches daily email or app notifications containing scanned images of incoming letter-sized mail alongside tracking updates for expected parcels. It is particularly useful for expats who travel for work or are often away from home during delivery hours.

Import duties represent one of the most significant considerations for expats who regularly receive goods from overseas. The rules changed substantially in 2025. From 29 August 2025, US-bound postal packages are subject to either duties calculated under International Emergency Economic Powers Act (IEEPA) tariff rates, or a flat duty of $80 to $200 depending on the applicable IEEPA rate. This marks a fundamental shift from the prior regime, under which goods valued below $800 entered the country duty-free through the de minimis exemption. Expats who frequently receive shipments from family abroad or shop from international online retailers should factor import charges into their planning. Consult the US Customs and Border Protection (CBP) website for the most current duty rates and thresholds, as these are subject to revision.

From September 2025, USPS requires all international commercial shipments to include a six-digit Harmonised System (HS) code on customs declaration forms for each item, regardless of which mail class is used. Anyone sending goods to the US from abroad should ensure their customs paperwork includes these codes to avoid delays or rejection at the border.

A range of items are prohibited or restricted from international mail streams, including firearms and ammunition, hazardous materials, certain food products, plants, and controlled substances. USPS serves more than 180 countries and provides guidance on weight limits, packing recommendations, and restricted items. For a comprehensive and up-to-date list, refer to the USPS International Mail Manual (IMM) at pe.usps.com/IMM.

Are there reliable alternatives to the national postal service in the United States?

The US private delivery market is among the most competitive in the world. Expats will find that FedEx, UPS, and DHL are readily available throughout the country and can present attractive alternatives to USPS depending on the specific shipment.

Both FedEx and UPS operate extensive networks of drop-off points, including branded retail stores and authorised partner locations at chains such as Walgreens and The UPS Store. For high-value or time-sensitive domestic shipments, many senders prefer these carriers because they offer tighter service guarantees and more detailed tracking capability than standard USPS options.

For international shipments heading to Europe, Asia, or Latin America, DHL is often worth comparing directly against USPS Priority Mail International, since DHL’s end-to-end international network reduces the number of carrier handoffs and can deliver more predictable transit times. Prices can vary considerably based on weight, destination, and declared value, so obtaining quotes from multiple providers before shipping is advisable.

Expats who send and receive parcels on a regular basis may also find mailbox services — offered by businesses such as The UPS Store or PostNet — to be a practical solution. These services provide a genuine street address rather than a PO Box number, which is important because certain online retailers and subscription services decline to ship to PO Boxes. A mailbox service address can be especially valuable during the period between arriving in the US and establishing a permanent home address.

During peak shipping periods, USPS has demonstrated notable capacity advantages over its competitors: in December 2024, it handled 45 percent more packages and processed over 350 million mailpieces on a single operating day compared with its private rivals. For high-volume, cost-conscious everyday shipping, USPS remains the default choice for the majority of US residents — and for most expats as well.

Frequently asked questions

How do I redirect my mail when I move to a new address in the United States?

USPS offers a Change of Address (COA) service, which you can complete online at usps.com, by visiting a post office, or by completing PS Form 3575. Mail forwarding can be set up for a temporary period (15 days to 6 months) or permanently. A small identity-verification fee applies for online submissions. Mail forwarding does not cover all mail types — some advertising mail and packages sent with certain services may not be redirected, so notify important senders separately.

Are mailboxes provided at rental properties in the United States?

In most cases, yes — single-family homes, townhouses, and most apartment buildings have dedicated letterboxes or cluster mailbox units. US federal regulations require that mail receptacles meeting USPS standards be provided. However, the size and security of letterboxes vary widely. In apartment buildings, mail is usually delivered to a bank of individual locked boxes in a common area. If you are moving into a property, ask the landlord about the mail arrangement and whether there is a mailbox key to collect.

How do I send valuables safely through the US postal system?

For valuable items, USPS Registered Mail provides the highest level of security, with a documented chain of custody throughout the delivery process. You can also add insurance to Priority Mail and Priority Mail Express shipments. For very high-value items, private couriers such as FedEx or UPS may offer higher declared value limits and more comprehensive insurance products. Always keep proof of posting and tracking numbers for any item of value.

How long does an international letter take to arrive in the United States?

Transit times for international letters vary widely depending on origin country, service used, and customs processing at the US border. As a general guide, letters from Western Europe or major Asian cities sent by standard international airmail typically take 7–21 days. Priority mail services from most countries are faster. Delays at US Customs and Border Protection can add time without notice. Check the sender’s postal operator website for their specific transit time estimates to the US.

Can I receive packages at a PO Box in the United States?

Yes, in most cases. USPS delivers packages to PO Boxes. For very large parcels that do not fit in the box, USPS will leave a parcel locker key in your box so you can retrieve the package from a larger storage locker at the post office. Note that some private couriers (such as FedEx and UPS) do not deliver to PO Box addresses, so if you use a PO Box as your primary address, you may need to use a physical street address for certain deliveries.

What should I do if my parcel is lost or damaged by USPS?

If a package is lost or damaged, you can file a claim online at usps.com. For Priority Mail and Priority Mail Express, insurance coverage up to a set limit is included at no extra charge. For other services, you must have purchased additional insurance to make a damage or loss claim. File your claim as soon as possible — USPS sets specific filing windows depending on service type. If you do not receive a satisfactory resolution, you can escalate to the USPS Consumer & Industry Affairs office or contact the Postal Regulatory Commission (prc.gov).

Does the United States have Sunday postal delivery?

USPS delivers Priority Mail Express seven days a week including Sundays. Package delivery on Sundays is also available in many areas, particularly in larger cities, through a partnership USPS maintains with Amazon. Standard First-Class Mail and most other services are not delivered on Sundays. Post offices are generally closed on Sundays, though some self-service kiosks within post office lobbies may be accessible for stamps, postage, and tracking.

What is Informed Delivery and how do I sign up?

Informed Delivery is a free USPS service that sends you daily email notifications showing scanned images of incoming letter-sized mail and tracking updates for expected packages. It is particularly useful for expats who travel frequently or work long hours. You can register at informeddelivery.usps.com using a USPS account, which requires identity verification. The service is available to most US addresses and covers mail processed through automated USPS sorting equipment.