Who Runs Post Offices in Colorado: A Federal Service, Not a State One

Every post office in Colorado is operated by the United States Postal Service, an independent agency of the federal government. There is no state postal department in Denver. Neither the legislature nor your county commissioners set counter hours, postage prices or staffing. If an office is closed or short-staffed, the fix runs through USPS, not through a Colorado agency.

What the state does control is the paperwork around the mail. The Colorado Secretary of State runs elections in which every active registered voter receives a mail ballot. County clerks record deeds and vehicle titles, and the Department of Revenue sends tax notices. All of it travels through the same post offices you use for stamps. That is why a reliable mailing address matters more here than in many states.

This page covers 435 Post Office listings across the state, from Bear Valley Post Office at 7555 West Amherst Avenue in Denver to Antonito Post Office at 428 Main Street in the San Luis Valley. Each entry carries an address and phone number, so you can call before you drive. In Colorado that call can save hours. The gap between offices runs from a few blocks downtown to a long mountain drive.

ZIP codes in the state begin with 80 or 81. The first three digits point to a regional sorting facility. Mail from small towns is commonly processed at a larger plant first, so a local letter can take longer than the distance suggests.

Denver, Colorado Springs and Aurora: How Front Range Post Offices Differ

Most Coloradans live along the Front Range corridor, and the density of post offices shows it. Denver has 21 listings, Colorado Springs 13 and Aurora 6. The Denver County page lists 19 offices. You rarely need to travel far, although the nearest office is not always the one holding your package.

City names in the data can hide neighborhood offices. Bear Valley Post Office in southwest Denver, Columbine Hills Post Office at 6698 South Iris Street in Littleton, and Downtown Englewood Post Office at 3330 South Broadway each serve their own part of the metro area. Aurora Post Office sits at 16890 East Alameda Parkway. Tower Post Office, at 18555 East Smoky Hill Road, serves the Centennial side of the Arapahoe County suburbs.

In Colorado Springs, Antares Post Office at 2641 East Uintah Street handles local customers. The Cadet Post Office is listed at 2360 Vandenberg Drive at the Air Force Academy. Access rules for a military installation may apply, so call 719-333-3317 before assuming you can walk in. The El Paso County page shows all 26 listings for the Pikes Peak region.

West of Denver, the Jefferson County listings range from Golden Post Office at 1100 Johnson Road to Kittredge Post Office at 26300 Hill Top Drive near Evergreen. Broomfield (Eagle View) Post Office is at 8800 West 116th Circle. One county can hold both a suburban office and a canyon office with a very different pace. Boulder's Valmont Post Office, at 2995 55th Street, sits on the east side of the city, away from the downtown core.

Metro offices are typically busiest at lunchtime, after work and in the weeks before Christmas. Self-service kiosks in many lobbies handle common mailing tasks. If a long line is the problem, try a smaller neighborhood office a few miles away.

Plains Towns, Mountain Valleys and the Western Slope: Rural Post Offices in Colorado

Outside the metro area, a post office is often the center of a small town. Weld County has 33 listings, the most of any county in our database. They are spread across farm towns on the northeastern plains around the county seat of Greeley. Many small offices serving small populations is a pattern that repeats across the eastern plains.

Mountain communities have the same pattern with different obstacles. Fairplay Post Office, at 517 Hathaway Street, sits in Park County at close to 10,000 feet. Bailey Post Office at 24 River Drive is also in Park County. Fraser Post Office, listed under Granby in our data at 520 Zerex Street, serves the Fraser Valley in Grand County. Black Hawk Post Office in Gilpin County and Glen Haven Post Office at 7420 County Road 43 near Estes Park round out the Rockies picture.

Southern and western Colorado add distance. Antonito Post Office serves Conejos County near the New Mexico line. Fort Garland Post Office, at 313 Colorado 159 and listed under Blanca, covers part of Costilla County. Cortez Post Office, at 35 South Beech Street, anchors Montezuma County in the southwest. Eckert Post Office, at 12570 Highway 65, serves Delta County's orchard country.

Many rural addresses get no home delivery. You may rent a PO Box, use a cluster box or collect mail at the window. The street address that 911 dispatchers use can differ from your mailing address. Give both when you set up utilities, a delivery account or a driver's license.

Small-town offices may keep shorter window hours than city branches, and some close for lunch. Confirm by phone before a long drive. Heavy snow and mountain pass closures can also delay the trucks that feed these offices, so allow extra days in winter for anything time-sensitive.

Services You Can Get at a Colorado Post Office

Services vary by office size. A large Denver or Colorado Springs station offers the full range. A one-clerk mountain office may offer only the basics. Call ahead for anything beyond stamps and parcels.

Passport service is the one residents ask about most. For a first-time adult passport book, the State Department application fee is currently $130. The post office collects a separate $35 execution fee. Fees change, so verify current amounts with the State Department before you go. Bring a completed but unsigned DS-11 form, proof of citizenship, a photo ID and photocopies of both.

Before You Go: ID, Timing and Mail Problems in Colorado

A few habits prevent most wasted trips. Use this checklist.

Election mail deserves extra care. Colorado ballots must be received by your county clerk by 7 p.m. on Election Day, and a postmark alone is not enough for most voters. Mail your ballot at least a week early, or use a county drop box.

If mail goes missing, start with the local office. Ask for a supervisor if the counter staff cannot help. USPS customer service is at 1-800-275-8777, and you can file a Missing Mail request online. Report suspected mail theft to the Postal Inspection Service as well as local police. Keep receipts and tracking numbers until the item arrives.

Post offices in Colorado 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 Colorado may have multiple post offices and main processing facilities.

Post Office locations are available in 353 cities across Colorado. They are spread across 59 counties.

Cities with the highest concentration of post office locations include Denver, Colorado Springs, Aurora, reflecting densely populated areas with multiple branch offices serving different neighborhoods and zip codes.

Residents of Colorado 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.

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Residents of Colorado 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 Colorado 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 Colorado to find the nearest location.

Mail in Colorado Through the Seasons: What Changes by Region and Month

Colorado's geography shapes how mail moves. Heavy snow in the high country, wildfire evacuations along the foothills and summer thunderstorms on the plains can all slow delivery. Resort towns also swell and shrink with the seasons. Part-time owners often rely on a PO Box or Hold Mail rather than home delivery. If you split the year between a Denver suburb and a mountain cabin, set your forwarding dates deliberately.

Local conditions also affect which office you choose. A rural customer in Montezuma County may drive to Cortez Post Office, while a Delta County fruit grower may pick up at Eckert. The pages for Montezuma County and Delta County list nearby offices with addresses and phone numbers. Comparing a few options before you leave can save a wasted trip. If your first-choice office has limited hours, a neighboring town may keep a better window schedule.

Keep your tracking number, receipt and the date of your visit. Those details speed up any claim or inquiry, whichever office you use.

Colorado Post Office Questions Answered

Post offices in Colorado are run by the United States Postal Service, an independent federal agency created by the Postal Reorganization Act of 1970. A Board of Governors directs it, the Postal Regulatory Commission oversees rates and service standards, and Congress sets the broad framework. Neither the State of Colorado nor a county can change hours, prices or staffing. If you have a complaint, start with the local postmaster, then call USPS customer service at 1-800-275-8777. If that stalls, the casework staff at your U.S. senator's or representative's Colorado office can contact USPS on your behalf.

Colorado conducts elections largely by mail, and every active registered voter is sent a ballot before each election. Your ballot must be received by your county clerk by 7 p.m. on Election Day, and a postmark alone does not count for most voters. Sign the return envelope, which typically comes with prepaid postage, and mail it at least a week early. You can also use a county drop box or a voting service center instead. Colorado's ballot tracking service lets you confirm that your county received your ballot, so check it before assuming a mailed ballot arrived.

Many Colorado post offices accept passport applications, but not all of them, and most work by appointment. Bring your completed but unsigned DS-11 form, proof of citizenship such as a certified birth certificate, a photo ID, and a photocopy of each. For a first-time adult passport book, the State Department application fee is currently $130, paid separately from the $35 execution fee that the post office collects. Some offices take passport photos for an extra charge. Metro offices in Denver, Colorado Springs and Aurora book up quickly, so check the State Department's acceptance facility search and call the office. Fees change, so confirm current amounts before you go.

Ask at the window, call the office first, or start a reservation on USPS.com. Prices vary by box size and by the location of the office. You need two acceptable forms of ID, at least one with a photo, plus proof of your address, and you sign an application. Small offices in places such as Fairplay Post Office on Hathaway Street or Bailey Post Office on River Drive may have only a few box sizes available, especially in busy seasons. If you only need mail for a short stay, ask about General Delivery, which holds letters in your name at a designated office for a limited time.

Winter storms and pass closures regularly slow trucks in mountain counties such as Park, Grand and Gilpin. Start with the tracking number and the Informed Delivery dashboard, which shows scanned letters and expected packages. Weather delays often clear within a few days without any action from you. If a letter is more than about a week overdue, file a Missing Mail request online with both addresses and a description of the item. For urgent items such as medication, call the local office and ask whether the delivery truck has arrived. A supervisor can often tell you more than the general hotline can.

No. These are separate records in separate systems. A USPS change of address forwards mail for a limited period but does not notify the Colorado Secretary of State or the Division of Motor Vehicles in the Department of Revenue. Update your voter registration through the Secretary of State's website so your ballot goes to the right county, and update the address on your driver's license or ID with the DMV. Also notify banks, insurers and your county if you own property, because tax notices go to the address on file. Do all of it before your move date so that nothing important gets lost.