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Fun Facts


Postal Service superlatives — everything you’ve ever wanted to know — and more.

Post Office Fun Facts

  • Highest — Alma, CO (80420) — 10,578 feet above sea level
  • Lowest — Death Valley, CA (92328) — 282 feet below sea level
  • Coldest — North Slope of Alaska: Barrow (99723) and Wainwright (99782)
  • Hottest   — Death Valley, CA (92328)
  • Wettest — Mt. Waialeale, near the Kapaa Post Office (96746) in Hawaii
  • Driest    — Death Valley, CA (92328)
  • Westernmost   — 48 contiguous — La Push, WA     (98350)
  • Westernmost   — 50 states — Adak, AK       (99546)
  • Easternmost   — 48 contiguous  — Lubec, ME     (04652)
  • Easternmost   — 50 states — Lubec, ME     (04652)
  • Southernmost — 48 contiguous — Key West, FL     (33040)
  • Southernmost — 50 states — Naalehu, HI   (96772)
  • Northernmost  — 48 contiguous — Angle Inlet, MN (56711)
  • Northernmost  — 50 states — Barrow, AK    (99723)
  • Most Centered (all 50) — closest to the geographical center of the 50 states — Belle Fourche, SD
  • Most Centered (48) — closest to geographical center of the 48 contiguous states — Lebanon, KS
  • Smallest Post Office — Ochopee Post Office, Ochopee, FL —  61.3 square feet
  • Largest Retail Space — James A. New York, NY —  393,000 square feet
  • Oldest in same building — Hinsdale, NH, since 1816
  • 2nd oldest — Castine, ME, since 1833
  • Most Extraordinary— Peach Springs, AZ, Post Office has walk-in freezers for food destined for delivery to the bottom of the Grand Canyon by mule train.
  • Most Needing a Bridge — the Point Roberts, WA, Post Office can be reached by car only by driving through British Columbia, Canada. Only a boat or float plane can travel directly there.
  • Most Subterranean Facility — Stamp Fulfillment Services, located in Kansas City, MO, is located in a limestone cave 150 feet under-ground. It is the Postal Service’s only facility located in such an under-ground environment. The consistent, year-round temperatures and humidity levels in the caves allow the stamps to be maintained in mint-quality condition. The underground facility also keeps the inventory and employees safe from snow, flooding, winds and tornadic activity common in the Midwest.

Just the Fun Facts

  • Most Common Post Office Names — Clinton is the most common Post Office name with 26 locations. Madison is second with 25. Franklin and Washington are third with 24. Chester and Marion are next with 23 each.
  • Most Common City Names — Franklin is the most common city name with 31 locations. Clinton and Washington are second, with 29 each. Arlington is third with 28. Chester, Georgetown, Madison and Salem are next with 27 each.
  • Most Common Street Names — the five most common street names in the country are Main, 2nd, Maple, Oak and Park — in that order.
  • Longest Main Street — the longest Main Street in America is located in Island Park, ID (83429) — it’s 33 miles long.
  • Most Unusual Delivery Method—Mule train delivery in AZ. Each mule carries about 130 pounds of mail, food, supplies and furniture down the 8-mile trail to the Havasupai Indians at the bottom of the Grand Canyon, averaging 4,000 pounds per day.
  • Another Unusual Delivery Method — boat delivery on the Detroit River in Michigan. The JW Westcott is a 45-foot contract mail boat out of Detroit that delivers mail to passing ships. The JW Westcott has its own ZIP Code — 48222.
  • Another Unusual Delivery Method — dock-to-dock delivery on the Magnolia River in Alabama. A 15-foot contract mail boat delivers to 176 dock-side mailboxes on a 31-mile stretch of the river.
  • There are nearly 42,000 ZIP Codes in the country.
  • The lowest ZIP Code is 00501, a unique ZIP Code for the Internal Revenue Service in Holtsville, NY.
  • The highest ZIP Code is 99950 in Ketchikan, AK.
  • The easiest ZIP Code to remember is 12345, a unique ZIP Code for General Electric in Schenectady, NY.
  • The longest rural delivery route is in Mangum, OK. The carrier travels 187.6 miles daily and delivers to 240 boxes.
  • The shortest rural delivery route is in Carrollton, TX. The carrier travels 1.2 miles daily and delivers to 312 central delivery boxes.
  • The Postal Service moves mail using planes, trains, trucks, cars, boats, ferries, helicopters, subways, float planes, hovercraft, mules, bicycles and feet.
  • More than 652,000 tires were used on the postal fleet in 2015. If stretched end-to-end, these tires would span 144 miles.
  • The Postal Service ordered more than 888 million rubber bands in 2015.

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