Top 8 Xlarge Mailboxes for Outside – Post-Mount Mailboxes

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1. Home & Comforts


Mailbox with Mail, mailboxes for Outside., Stanley Extra-Large Galvanized Steel Post-Mount Mailbox, Large Mailbox, Black

Home & Comforts #ad - W x 15 in. Approved by the United States postal service postmaster general. Engineered with top quality galvanized steel and an aluminum outgoing mail flag. Includes an adjustable steel door latch to provide a secure fit. The expansive body measures 11. 7 in. Mailbox features a durable ribbed body and powder coat paint finish that adds strength and resistance against weathering. Extra-large capacity unit offers enormous space for medium to large size boxes and other various types of mail. Mounting bracket and hardware sold separately. H x 24. 8 in. D.
BrandHome & Comforts #ad
ManufacturerDoes Not Apply #ad
Height15 Inches
Length24.8 Inches
Width11.7 Inches



COLIBYOU Post Mount Mailbox Extra Large Postal Storage Box Gray Galvanized Steel Heavy, mailboxes for Outside, Large Mailbox.

COLIBYOU #ad - Extra-large size offers abundant space for high volumes of mail and large packages. Engineered from quality galvanized steel for rust-resistance. The powder-coated finish helps prevent discoloration from outdoor elements.
ManufacturerCOLIBYOU .No #ad
Height50 Centimeters
Length100 Centimeters
Weight100 Kilograms
Width100 Centimeters



X-Large, Rubbed Bronze, Architectural Mailboxes 6300RZ Oasis 360 Locking Parcel Mailbox with 2-Access Doors

ARCHITECTURAL MAILBOXES #ad - Mounting holes in floor allows for easy installation. Galvanized steel construction that is fully powder coated inside and out for added corrosion resistance. L x 2. 5 in. W x 12. 6 in. Dual door locking Parcel mailbox, two doors for easy access. D. W x 3. 5 in. W x 11. 5 in. Usps approved oasis 360 locking mailbox is 11. 3 in. Accepts parcels 9. 5 in. Predrilled 4 in. Hardware and mounting bracket may be required to mount to posts not manufactured by Architectural Mailboxes not included. H to 9. 5 in. X 10 in. H x 20 in. H. L x 1. 5 in.
ManufacturerArchitectural Mailboxes #ad
Height11.5 Inches
Length20 Inches
Width11.3 Inches
Part Number6300RZ
WarrantyLimited Lifetime



Architectural Mailboxes 950020B-10 Centennial Postmount Mailbox, XL, Black

ARCHITECTURAL MAILBOXES #ad - X 12 in. And still has room for additional mail and parcels. Mailbox measures 18 in. Sleek magnetic door closure provides reliability all while keeping door firmly closed. Predrilled 4 in. Heavy gauge galvanized steel body equipped with stainless steel door pins then fully powder coated for corrosion resistance. Larger inner compartment can accept a usps priority mail large flat rate box 12 in. Hole pattern in floor allows for mounting to existing post installation hardware not included. X 10 in. X 5. 5 in. X 14 in. X 12 in.
ManufacturerArchitectural Mailboxes #ad
Height11.93 Inches
Length18.35 Inches
Width14.17 Inches
Part Number950020B-10
Warranty1 Year Limited Lifetime Warranty

5. Dry Mailbox


Black, Outdoor Metal Mailbox with Mailbox Insert to Keep Mail Dry, Outside, Galvanized Large Mailbox & Accessories for House

Dry Mailbox #ad - Measuring 19. 3 x 9. 6 x 7. 2 inches, padded envelopes and small parcels. Mailbox insert to keep mail dry: with your purchase, you will also get a patented dry mailbox insert that keeps your mail and important documents from getting wet because of melted snow, water or humidity.

It will never be an eyesore, but instead it will complement your property perfectly. Built to last construction: our outdoor mailbox is crafted from galvanized steel and is double coated. The inside has two coats of black glossy paint and the outside has two coats of black paint followed by 3 coats of white metallic paint for elegance. Avoid any letters and packages left on the doorstep and getting in unwanted hands with our mailbox. Our house mailbox not only looks elegant but is a functional and convenient modern solution for your home and postal needs.

Hassle free installation & sufficient storage capacity:: not a handyman? Don't worry, magazines, this mailbox has sufficient storage space for mail, this postal mailbox is super simple to install with minimum tools. Elevate the look of your property: the contrast of the black handle, red flag and black interior gives this post-mount mailbox a touch of elegance to your home.
BrandDry Mailbox #ad
ManufacturerMDLMI #ad

6. Gibraltar Mailboxes


Black, Extra Large, Gibraltar Mailboxes GHC40B01 Grand Haven Decorative Package Mailbox

Gibraltar Mailboxes #ad - Extra-large size provides abundant space for packages. Heavy-duty, rust-proof plastic construction ensures maximum durability. Impressive craftsman design and textured finish adds distinction. Post sleeve installs over 4×4 wooden post sold separately. Some assembly is required. Space provided for address letters or numbers. Magnetic door latch keeps mailbox closed.
BrandGibraltar Mailboxes #ad
ManufacturerSolar Group, inc. #ad
Height54.12 Inches
Length20.1 Inches
Width16.63 Inches
Part NumberGHC40B01
Warranty90 day limited warranty

7. Mail Boss


Black,Large, Mail Boss 7506 Mail Manager Curbside Locking Security Mailbox

Mail Boss #ad - Accessories: includes concealed outgoing mail clip, 3 keys, and required installation hardware. Patented: includes patented anti-pry latch lock mechanism to prevent leveraged entry with a screwdriver & high security anti-drill, anti-pick 12-disc wafer lock.

Usps approved full-service residential locking security mailbox prevents mail-identity theft; Stainless steel hinges for ease of use. Does not include or require Mounting Plate. Quality: 14- and 16-gauge galvanized welded steel construction defends against vandalism. Security: innovative baffle door accepts small parcels, packages, and a box of checks and also deters fishing.
BrandMail Boss #ad
ManufacturerMail Boss #ad
Height11 Inches
Length21 Inches
Weight26 Pounds
Width10 Inches
Part Number7506
WarrantyLimited Lifetime

8. Gibraltar Mailboxes


Large, Gibraltar Mailboxes MLM16KB1 Marshall Locking Mailbox, Black

Gibraltar Mailboxes #ad - Rust-resistant galvanized steel construction. Mounting hardware sold separately. Magnetic latch keeps door securely closed. Two keys provided for access to delivered mail. Capacity: 1475 Cubic Inches. Aluminum outgoing mail flag. Internal mail clip for outgoing mail included. Painted in an attractive glossy powder-coated finish for extra protection against weathering. Concealed locking compartment protects mail from theft. Match with any gibraltar Mailboxes post with the designation letter code C.
BrandGibraltar Mailboxes #ad
ManufacturerSolar Group, Inc. #ad
Height11.8 Inches
Length20 Inches
Width11.7 Inches
Part NumberMLM16KB1
Warranty90 Day Limited