Post Office Service Across Wyoming

Wyoming has fewer residents than any other state, yet it has a surprisingly large number of post offices. Our directory lists 146 of them, from the Capitol Station Post Office on Capitol Avenue in Cheyenne to the Boulder Post Office on Wyoming 353 in Sublette County. Many of these counters serve only a few hundred people, and some are among the few public buildings in town with set weekday hours.

That makes the local post office more than a place to buy stamps. In much of Wyoming it is where ranch families collect packages, where small businesses ship orders, and where neighbors catch up. This page explains how the system is organized, how it differs between towns and rural areas, and how to get the most out of a visit.

Who Actually Runs Wyoming's Post Offices

A common question is which state agency oversees post offices in Wyoming. The answer is none. The United States Postal Service is an independent agency of the federal government, and its operations are set by federal law, mainly Title 39 of the United States Code. The state, its counties and its cities do not staff, fund or regulate these counters.

Day to day, each office is managed by a postmaster or, in the smallest towns, a lead clerk who reports up to a regional USPS district. Rates, service standards and hours are set by USPS, with rate oversight from the Postal Regulatory Commission in Washington. A complaint about delayed mail or a missed delivery goes to the local office first, then to USPS customer service if it is not resolved.

Because the system is federal, the rules are the same in Cheyenne as in Alva. A first-class stamp costs the same in every Wyoming town, and the same identification rules apply for passports, registered mail and other regulated services. What changes from place to place is the size of the building, the number of clerks on duty and the hours posted on the door.

Wyoming's Cities Versus Its Rural Counters

Larger Towns With Fuller Service

The busiest offices sit in Cheyenne, Casper, Sheridan, Jackson and Riverton. Cheyenne, the state capital, has three listings in our database, including Capitol Station at 2120 Capitol Avenue (307-772-7080). The Casper Post Office at 411 North Forest Drive (307-237-8556) serves the state's second-largest city and the surrounding Natrona County communities.

Laramie County shows the contrast well. Its 10 listings include the Cheyenne offices but also the Albin Post Office at 221 Cheyenne Avenue (307-246-3446), a small-town counter on the eastern plains. Both are run by the same federal agency, yet the experience of walking in differs a great deal.

Jackson is a different kind of busy. The Downtown Jackson Post Office at 220 West Pearl Avenue (307-739-1740) in Teton County handles a mix of year-round residents, seasonal workers and part-time homeowners, so lines tend to grow in peak tourist months and around the holidays. In Sheridan, the office at 101 East Loucks Street (307-672-0714) serves a compact downtown, while Riverton's office at 501 East Main Street (307-856-3725) is a central stop in Fremont County.

Fremont County has 11 listings, including the Saint Stephens Post Office at 33 Saint Stephens Road in Arapahoe (307-856-7050). Communities in this part of the Wind River Basin are spread out, so a single counter often covers a wide area.

Small Towns and Ranch Country

Outside the cities, a post office may be a one-room building with a few dozen boxes and a single clerk. Examples in our listings include the Alva Post Office at 2510 Wyoming 24 (307-467-5407) and the Beulah Post Office on U.S. 14, both in Crook County. The Alcova Post Office at 22495 Highway 220 (307-234-0074) serves the Alcova Reservoir area west of Casper, and the Bairoil Post Office at 503 Antelope Drive (307-324-5541) sits in Sweetwater County.

Some listings carry a mailing city that differs from the town name. The Savery Post Office, at 1132 Wyoming 70 (307-383-7878), is listed under Baggs in Carbon County. The Dayton Post Office, at 112 West 3rd Avenue (307-655-9342), appears under Ranchester in Sheridan County. If you are searching by town, check the street address and phone number so you reach the right counter.

In these places, post office boxes are the norm. Many households collect mail in town because the nearest delivery route may be far from the house. Boxes come in several sizes and are rented through the local office, so ask the clerk what is available and what proof of address you need.

The Star Valley in western Wyoming shows how a county can have many small offices close together. Lincoln County has the most listings of any county at 12, including the Afton Post Office at 31 West 4th Avenue (307-886-3625) and the Auburn Post Office at 449 West 1st North Street (307-886-9933). In the Bighorn Basin, Big Horn County also has 12, among them the Basin Post Office at 402 C Street (307-568-2228) and the Cowley Post Office at 71 East Main Street, listed under Lovell (307-548-2689).

What to Bring to a Wyoming Post Office Counter

Most visits are quick, but a few services need preparation. Bring the following, depending on your errand:

Hours vary widely. Larger offices keep fuller weekday schedules and often Saturday hours. Smaller offices may close at midday or open fewer hours, so a short phone call can save a long drive.

Winter, Wind and Distance: Timing a Trip in Wyoming

Geography shapes mail service here more than anywhere else in the Lower 48. Winter storms and high wind close Interstate 80 across southern Wyoming for stretches each year, and mail trucks wait with everyone else. Packages headed to or from Fort Bridger, Pinedale or Big Piney may arrive a day or two late after a major storm. The Wyoming Department of Transportation publishes road conditions and closures through its travel information service, which is worth checking before a long drive to a remote counter.

The Fort Bridger Post Office at 3730 County Road 219 (307-782-6573) in Uinta County and the Pinedale Post Office at 413 Pine Street (307-367-2650) show the pattern. Both serve wide areas with few other services nearby, so residents often combine a mail run with groceries and fuel. Sublette County adds the Big Piney Post Office at 420 Budd Avenue (307-276-3772) and the Boulder office, both in the upper Green River country.

Plan around the calendar as well. Mid-December brings heavy parcel volume, and late-summer tourism raises traffic in Teton County. Mail that must arrive by a deadline, such as tax paperwork, vehicle registration or ballots, should go out earlier than you would in a city. Ask the clerk for tracking on anything important, and keep the receipt until the item is confirmed delivered.

Post offices in Wyoming are part of the national USPS network, operating under regional district management to deliver uniform service standards while accommodating the specific needs of urban, suburban, and rural communities across the state. Larger cities in Wyoming may have multiple post offices and main processing facilities.

Post Office locations are available in 129 cities across Wyoming. They are spread across 22 counties.

Cities with the highest concentration of post office locations include Cheyenne, Pinedale, Afton, reflecting densely populated areas with multiple branch offices serving different neighborhoods and zip codes.

Residents of Wyoming can use the USPS website to find the closest post office, check current lobby and window hours, locate self-service kiosks available after hours, and track incoming and outgoing mail and packages from their phones or computers.

Post Office by Counties

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Residents of Wyoming can save time by using USPS online tools to schedule package pickups from home, print prepaid shipping labels, and set up mail forwarding or hold requests without visiting a post office. When visiting a post office in Wyoming for passport acceptance, call ahead to confirm that the specific location offers the service and whether an appointment is required.

Browse Post Office by county across Wyoming to find the nearest location.

Mailing Tips for Wyoming's Remote Communities

Living far from town changes how you handle mail. Start by confirming how your address is served. Some rural households get delivery on a carrier route, while others collect from a PO Box or a general delivery window. The local postmaster can tell you which applies to your road, and a quick call to the office usually settles it.

If you split time between Wyoming and another state, set up mail forwarding or a temporary hold before you leave. Seasonal residents in Jackson, the Star Valley and the Bighorn Basin do this every year. If you run a small ranch or business, ask your local counter about pickup options and shipping supplies. Keep the office phone number handy, since a clerk who knows you can often tell you when a delayed truck is expected.

Residents of Sheridan County, which has 10 listings including Arvada at 25 Atoka Street (307-736-2214), can use the same steps. Whether the office is a larger downtown counter or a small rural one, the process is the same.

Wyoming Post Office FAQs

No state agency does. Post offices in Wyoming are operated by the United States Postal Service, an independent federal agency governed by federal law. Rates and service standards are national, and the Postal Regulatory Commission provides oversight. Wyoming counties and cities do not run or fund the counters. For a problem such as missing mail, start with the postmaster at your local office. If that does not solve it, contact USPS customer service or file a service request through the USPS website, and keep tracking numbers, dates and receipts so the case can be traced.

Many Wyoming post offices accept first-time passport applications, but not every small counter does, and most work by appointment. Call the office before you go, for example the Casper Post Office at 307-237-8556 or the Sheridan Post Office at 307-672-0714. Bring the completed DS-11 form, proof of citizenship, a photo ID and photocopies of each. You will pay the State Department fee and a separate acceptance fee. Because rural offices may have limited hours, confirm the day and time, and ask whether photos are available on site.

It depends on the address. In many small Wyoming communities, residents rely on post office boxes at the local counter, and others are served by rural carrier routes. The Alva Post Office (307-467-5407) and the Beulah Post Office, both in Crook County, are examples of small offices where the clerk can tell you how a given address is served. If you are moving to a rural property, ask the postmaster before you set up deliveries from other companies, since some carriers cannot deliver to a PO Box.

This happens often in Wyoming. The Savery Post Office is at 1132 Wyoming 70 and is listed under Baggs, while the Dayton Post Office at 112 West 3rd Avenue is listed under Ranchester. Search by the street address and the phone number rather than by town name alone. You can also use the ZIP Code lookup on the USPS website, since Wyoming ZIP codes start with 82 or 83. If you are still unsure, call the nearest listed office and ask which counter serves your address.

Winter storms and high wind can close highways, including stretches of Interstate 80, and mail moves slowly when trucks are held. Remote areas such as Sublette County, Uinta County and the Wind River Basin may see delays of a day or more after a large storm. Check road conditions through the Wyoming Department of Transportation before driving to a distant office. Send time-sensitive items early, choose tracking for anything important, and keep your receipt. If you rely on mail for medication or documents, ask the local clerk about the most dependable service option.

For a short absence, USPS offers a hold mail service of up to 30 days, which you can request online or at the counter. For longer stays away, set up temporary forwarding or keep a PO Box that you can check on return. The Downtown Jackson Post Office (307-739-1740) in Teton County and the Afton Post Office (307-886-3625) in Lincoln County can explain the options. Update your address with banks, insurers and the state before you leave, and tell family or a neighbor who can collect important packages.