Elsewhere, the Postal Service moves mail by planes, hovercraft, trains, trucks, cars, boats, ferries, helicopters, subways, bicycles and feet.
Map facts
Discover fun and interesting geographic facts about the U.S. Postal Service!
Postal Facts - U.S. Postal Service
MULE
mail delivery
The most unusual delivery method used by USPS is a mule train in Arizona. The mules carry mail, food and supplies down an 8-mile trail to the Havasupai Indians at the bottom of the Grand Canyon.
31
cities
Franklin is the most common city name in the country with 31. Clinton and Washington are tied for second with 29 and Arlington is at third with 28. The most common Post Office name is Clinton, with 26 locations, followed by Madison with 25 and Franklin and Washington tied for third with 24.
33
miles long
The longest main street is in Island Park, ID, and is 33 miles long.
13,000
Main streets
The most common street name in the country is Main - more than 13,000 of them - followed by 2nd and Maple, with more than 8,000 each.
45,742
street deliveries
The ZIP Code with the most possible street deliveries is Cathedral Station, NY's 10025 - with 45,742!
Coldest
Post Office
Our Post Offices located on the North Slope of Alaska, in Barrow and Wainwright, experience the coldest temperatures.
0.18
miles
The shortest rural delivery route is in Athens, GA. The carrier travels 0.18 miles and delivers to 280 boxes.
185.4
miles
The longest rural delivery route is in Erie, KS. The carrier travels 185.4 miles and delivers to 174 boxes.
12345
easiest to remember
The easiest to remember ZIP Code is 12345, a unique ZIP Code for General Electric in Schenectady, NY.
HIGHEST
ZIP Code number
The highest ZIP Code number is 99950 in Ketchikan, AK.
LOWEST
ZIP Code number
The lowest ZIP Code number is 00501, unique for the Internal Revenue Service in Holtsville, NY.
Delivery
dock-to-dock
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.
Boat
delivery with ZIP
Boat delivery is available on the Detroit River in Michigan. The JW Westcott is a 45-foot contract mail boat that delivers mail to passing ships and has its own ZIP Code: 48222.
150
feet underground
Stamp Fulfillment Services in Kansas City, MO, is located in a limestone cave 150 feet underground. It keeps inventory and employees safe from snow, flooding, winds and tornadoes common in the Midwest.
LAND EXCLAVE
of the USA
The Post Office in most need of a bridge is in Point Roberts, WA. It can be reached by car only by driving through British Columbia, Canada. Only a boat or float plane can travel directly there.
FREEZERS
for food delivery
The most extraordinary Post Office is in Peach Springs, AZ. The building includes walk-in freezers for food destined for delivery to the bottom of the Grand Canyon by mule train.
2ND OLDEST
Post Office
The second oldest Post Office location is in Castine, ME, from 1833.
Oldest
Post Office
The Hinsdale, NH, Post Office has been located in the same building since 1816.
LARGEST
retail space
The largest U.S. Postal Service retail space is the James A. Farley Post Office in New York, NY, at 393,000 square feet.
Tiny
post office
The smallest Post Office is located in Ochopee, FL, at 61.3 square feet. The building used to be a storage facility for irrigation pipes of an adjacent tomato farm. It was converted into a Post Office in 1953, after a fire that destroyed a previous Post Office and general store.
Stuck
in the middle
The most centered Post Office within the 48 contiguous states is located in Lebanon, KS.
MOST CENTRAL
Post Office of them all
The most centered Post Office within all 50 states is located in Belle Fourche, SD.
Northernmost
Barrow, AK
The northernmost post office location within the 50 states is in Barrow, AK.
FARTHEST NORTH
within 48 states
The northernmost Post Office location within the 48 contiguous states is in Angle Inlet, MN.
FARTHEST SOUTH
within the 50 states
The southernmost Post Office location within the 50 states is located in Naalehu, HI.
FURTHEST SOUTH
within 48 states
The southernmost Post Office location within the 48 contiguous states is located in Key West, FL.
FARTHEST EAST
within the 50 states
The easternmost Post Office location in the 50 states is in Lubec, ME.
FARTHEST WEST
within the 50 states
The westernmost Post Office location in the 50 states is in Adak, AK.
FARTHEST WEST
in the 48 contiguous states
The westernmost Post Office location in the 48 contiguous states is in La Push, WA.
WETTEST
U.S. Post Office
The wettest Post Office is at Mt. Waialeale, near the Kapaa Post Office in Hawaii.
LOWEST
U.S. Post Office
The lowest U.S. Post Office is located in Death Valley, CA, at 282 feet below sea level. This is also the driest and hottest Post Office location.
HIGHEST
U.S. Post Office
The highest Post Office in the United States is located in Alma, CO, at 10,578 feet.
FURTHEST NORTH
within 50 states
The northernmost Post Office location within the 50 United States of America is in Barrow, AK.
