Top 8 Exlarge Mailboxes for Outside – Post-Mount Mailboxes

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Architectural Mailboxes 6200B-10 Oasis Classic Locking Post Mount Parcel Mailbox with High Security Reinforced Lock,Black,18.00 x 15.00 x 11.50 inches

ARCHITECTURAL MAILBOXES #ad - 18-inch d x 14-inch h x 11. 5-inch w, 23-pound - use adapter Plate 7530-10 for 4x4 wood post installation. Suitable for installation into a pilaster or column - the entire outer shroud is one piece to resist moisture and the elements.

Postmaster general approved and patented design allows delivery of mail bundles and small parcels - perfect for Internet and catalog shoppers. Doors include rubber seals to keep deliveries clean and dry - all hardware made from stainless steel and other corrosion resistant materials. Body constructed of heavy 16 and 18 gauge galvanized steel fully powder coated prior to assembly for durability and long life.
ManufacturerArchitectural Mailboxes #ad
Height14 Inches
Length18 Inches
Weight5.91 Pounds
Width11.5 Inches
Part Number6200B-10
Warranty1 year manufacturer limited warranty



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

ARCHITECTURAL MAILBOXES #ad - Predrilled 4 in. And still has room for additional mail and parcels. Larger inner compartment can accept a usps priority mail large flat rate box 12 in. Heavy gauge galvanized steel body equipped with stainless steel door pins then fully powder coated for corrosion resistance. X 10 in. Sleek magnetic door closure provides reliability all while keeping door firmly closed. X 14 in. X 12 in. Mailbox measures 18 in. X 12 in. Hole pattern in floor allows for mounting to existing post installation hardware not included. X 5. 5 in.
ManufacturerArchitectural Mailboxes #ad
Height11.93 Inches
Length18.35 Inches
Weight14.08 Pounds
Width14.17 Inches
Part Number950020B-10
Warranty1 Year Limited Lifetime Warranty

3. Fulton


Fulton Extra Large Post Mount Mailbox #2 Black

Fulton #ad - 11"w x 12"h x 23-1/2"l Size. Hot dip Galvanized Steel. Very Traditional. Satin Black Finish. Fully assembled.
BrandFulton #ad
ManufacturerFulton Corporation #ad
Weight10.15 Pounds
Part Number2C-BLK

4. Gibraltar Mailboxes


Gibraltar Mailboxes Stanley Extra-Large Capacity Galvanized Steel Black, ST200B00, Post-Mount Mailbox

Gibraltar Mailboxes #ad - Extra large size provides 3, 175 cubic inches of space to receive letters, padded envelopes and multiple boxes simultaneously. Engineered with rust-resistant galvanized steel for extended endurance. Black powder-coated finish provides resistance against outdoor elements. Match with any Gibraltar mailbox post with the designation letter code D. Mailbox is completely assembled and ready for use. Ribbed body enforces extra strength and stability. Mounting hardware is not included. Door latch and outgoing mail flag can be adjusted for a tighter grip.
BrandGibraltar Mailboxes #ad
ManufacturerSolar Group #ad
Height15.83 Inches
Length24.69 Inches
Weight11.5 Pounds
Width11.56 Inches
Part NumberST200B00
Warranty7 Year Warranty

5. Gibraltar Mailboxes


Gibraltar Mailboxes Garrison Large Capacity Galvanized Steel Venetian Bronze, Post-Mount Mailbox, GM160VBEC

Gibraltar Mailboxes #ad - Match with any gibraltar Mailboxes post with the designation letter code B. Powder-coated finish adds extra protection from elements. Large capacity accommodates small to medium size parcels. Made from rust-resistant galvanized steel. Mounting hardware sold separately. Magnetic door catch keeps door closed firmly. Sides feature embossed lines to assist with aligning address numbers. Pre-drilled holes on sides and bottom for post mounting.
BrandGibraltar Mailboxes #ad
ManufacturerSolar Group, Inc. #ad
Height10.8 Inches
Length23.6 Inches
Weight9 Pounds
Width8.9 Inches
Part NumberGM160VBEC

6. Gibraltar Mailboxes


White, Gibraltar Mailboxes GHP40W01 Grand Haven Decorative Plastic Post

Gibraltar Mailboxes #ad - Compatible with most mailboxes. Easily installs over 4×4 wooden post sold separately. Impressive craftsman design and textured finish adds distinction. Some assembly is required. Heavy-duty, rust-proof plastic construction ensures maximum durability. Space provided for address letters or numbers.
BrandGibraltar Mailboxes #ad
ManufacturerSolar Group, inc. #ad
Height41.25 Inches
Length15 Inches
Width6.96 Inches
Part NumberGHP40W01
Warranty90 day limited warranty



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

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.
ManufacturerNo #ad
Height50 Centimeters
Length100 Centimeters
Weight100 Kilograms
Width100 Centimeters

8. Gibraltar Mailboxes


Gibraltar Mailboxes ADM11B01 Admiral Mailbox, Textured Black

Gibraltar Mailboxes #ad - Specially reinforced body brace increases strength. Match with gibraltar Mailboxes posts with the designation letter A. Textured, powder-coated finish keeps like new. Recommended with aluminum mounting hardware sold separately. Fully assembled with pre-drilled side and bottom mount patterns. 60% thicker material than most standard mailboxes. Patented door design keeps rain out and maximizes durability. Rust-proof aluminum provides protection from weather and salt.
BrandGibraltar Mailboxes #ad
ManufacturerSolar Group, Inc. #ad
Height9.5 Inches
Length20.8 Inches
Weight2.6 Pounds
Width6.9 Inches
Part NumberADM11B01