October 29, 2025

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10 Best plastic post mailboxes of 2025

Save up to 36% off

Best Choice

1

ARCHITECTURAL MAILBOXES
Architectural Mailboxes Stratford Plastic Mailbox and Post Kit, SC000BAM, Black, Medium Capacity
Main highlights

Durable Construction and UV Protection
Constructed from highly durable polycarbonate plastic that will not rust or deteriorate; includes a UV inhibitor to prevent color fading.

Ideal for Residential Curb Appeal
Decorative style adds curb appeal to any landscape; designed to install over a 4x4 wooden post at 72 inches recommended height.

Sturdy and Elegant Design
Customers praise the sturdy construction and elegant design; enhances curb appeal and withstands weather conditions without fading.
Key specs
- color:Black
- material:Plastic
- mounting:Post Mount
- style:Contemporary
- capacity:925 Cubic Inches
9.8

Exceptional

Our Rating

9.5
Fashion

9.1
Easy to build

8.9
Easy installation
How do we rank?

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Careful review Our team ensures quality, value, and fit based on real user feedback

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Based on millions of stores and reviews

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Value for Money

2

ARCHITECTURAL MAILBOXES
ARCHITECTURAL MAILBOXES Grand Haven Plastic, Mailbox and Post Kit, Black Extra Large

20% Off
Main highlights

Oversized Mailbox and Post Combo
Convenient combination includes mailbox, slip-over post sleeve, mounting and installation hardware. Extra-large capacity perfect for online shoppers. Constructed from heavy-duty, rust-proof plastic.

Ideal for Frequent Shippers
Perfect for online shoppers and small business owners. Holds multiple packages alongside mail, magazines, and padded envelopes. All-weather durability with a UV inhibitor.

Ease of Assembly
Commonly praised for easy assembly. Most users assembled it in just a few minutes using only a screwdriver. Clear instructions and snug-fitting parts.
Key specs
- color:Black
- material:Plastic
- mounting:Post Mount
- style:Contemporary
- capacity:2175 Cubic Inches
9.6

Exceptional

Our Rating

9.5
lasts a long time

8.4
Durability

8.4
Easy to build
3

ARCHITECTURAL MAILBOXES
Architectural Mailboxes Parsons Medium Capacity, Plastic Post Mount Mailbox, Black

20% Off
Main highlights

Durable and Weather-Resistant
Constructed from rust-proof polypropylene plastic, UV inhibitor finish protects against weathering, ensuring longevity and durability against wear and impact.

Ideal for Average Mail Deliveries
Medium capacity accommodates average volume mail deliveries including padded envelopes, magazines, and small-sized packages. Perfect for residential use.

Easy Installation Praised by Customers
Customers consistently praise the ease of installation, noting that it can be installed quickly with just four screws and minimal effort.
Key specs
- access:Front
- color:Black
- material:Plastic
- mounting:Post Mount
- style:Classic
9.5

Excellent

Our Rating

9.3
lasts a long time

9.1
worth the money

9.1
Easy installation
4

ARCHITECTURAL MAILBOXES
Architectural Mailboxes Newbury™ Rust-Proof Plastic Post Mounted Mail Box for Outside with Post, Mocha, Medium Curbside Mailbox, USPS Approved for Residential Delivery

15% Off
Main highlights

Durable and Weather-Resistant
Constructed from highly durable polycarbonate plastic that will not rust or deteriorate. Smooth, powder-coated finish with UV inhibitor to prevent color fading.

Ideal for Residential Use
Medium capacity mailbox fits small boxes, magazines, and padded envelopes. Easily and quickly installs directly in-ground, concrete recommended for loose soil.

Praised for Easy Assembly
Customers appreciate the easy assembly and sturdy construction. Many reviews highlight the mailbox's great value for money and aesthetic appeal.
Key specs
- color:Mocha
- material:Plastic
- mounting:Post Mount
- style:Contemporary
- capacity:875 Cubic Inches
9.4

Excellent

Our Rating

9.9
Easy to build

9.7
Easy installation

9.5
worth the money
5

Gibraltar Mailboxes
Gibraltar Mailboxes Patriot Large Capacity Rust-Proof Plastic Black, Post-Mount Mailbox, GMB515B01
Main highlights

Key Features
Large capacity for bigger parcels, rust-proof plastic for durability, wide opening for easy delivery, and includes an arrival indicator flag.

Ideal Use Cases
Perfect for receiving large mail items, padded envelopes, and magazines flat. Great for homes needing a durable, weather-resistant mailbox solution.

Customer Praise
Most reviews highlight its spacious design, ease of installation, and how effectively it keeps mail dry and secure.
Key specs
- access:Front
- color:Black
- material:Polymer
- mounting:Post Mount
- style:Mailbox
9.3

Excellent

Our Rating

9.9
worth the money

9.9
lasts a long time

9.9
Easy to build
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6

Step2

Step2 MailMaster Plus Mailbox & Post, Weather Resistant, Large Outdoor Mailboxes, Made of Durable Plastic, Easy to Install, Flag Included, Black

24% Off
9.0

Excellent

Our Rating

9.9
lasts a long time

9.7
Easy installation

9.7
Durability
7

ARCHITECTURAL MAILBOXES
Architectural Mailboxes Classic Plastic, Dual Access, Mailbox and Post Kit, GCL100BAM, Black, Medium Capacity

10% Off
Main highlights

Convenient Combination Includes All Necessary Hardware
The mailbox set includes a slip-over post sleeve, mounting and installation hardware, and a rust-proof, double-walled plastic construction that is virtually indestructible.

Ideal For Homeowners On Busy Roads
Perfect for homeowners who need a medium capacity mailbox that fits small boxes, magazines, and padded envelopes, with a rear door for safe access.

Most Praised Feature Is Easy Installation
Customers frequently praised the easy installation process, noting that it slides easily over existing posts and offers great value for the money.
Key specs
- color:Black
- material:Plastic
- mounting:Post Mount
- style:Contemporary
- capacity:800 Cubic Inches
8.7

Very Good

Our Rating

9.5
worth the money

9.3
Durability

8.4
Easy installation
8

ARCHITECTURAL MAILBOXES
Architectural Mailboxes Patriot Plastic Post Mount Mailbox, Compatibility Code E, GMB505BAM, Black, Medium Capacity

36% Off
Main highlights

Key Features
Durable rust-proof polypropylene, UV protected, pre-drilled holes for easy installation. Ideal for average mail volume, including padded envelopes and magazines.

Ideal Use Cases
Perfect for homeowners seeking a weather-resistant mailbox for daily mail, magazines, and small packages. Matches with Architectural Mailboxes posts (designation letter E).

Customer Reviews
Most praised for its durability against weather and impact, ensuring longevity and reliability for everyday mail delivery.
Key specs
- access:Front
- color:Black
- material:Plastic
- mounting:Post Mount
- style:Contemporary
8.6

Very Good

Our Rating

9.7
Waterproof

9.5
Easy installation

9.3
Durability
9

ARCHITECTURAL MAILBOXES
Architectural Mailboxes Whitley Plastic Mailbox Post, Compatibility Code A, B, C, WP000WAM, White

14% Off
Main highlights

Key Features
Durable, rust-proof polypropylene construction. Easy installation over 4x4 post. Supports up to 40 lbs. and compatible with many mailboxes.

Ideal Use Cases
Perfect for homeowners seeking a decorative, reliable mailbox post. Great for areas susceptible to rust or needing dual mailbox support.

Customer Reviews
Highly praised for its durability and ease of installation. Many appreciate its compatibility with various mailboxes and aesthetic appeal.
Key specs
- color:White
- material:Plastic
- mounting:Post Mount
- style:Contemporary
- capacity:Supports up to 40 lbs
8.5

Good

Our Rating

8.7
Easy installation

8.2
Easy to build

8.0
Durability
10

Step2

Step2 Town-to-Town XL Post-Mount Mailbox, Weather Resistant, Large Outdoor Mailboxes, Made of Durable Plastic, Easy to Install, USPS T4 Sized Mailbox, Flag Included, Onyx Black

20% Off
8.3

Good

Our Rating

9.7
lasts a long time

9.7
Durability

9.3
Easy installation

10 Best plastic post mailboxes of 2025

1

Architectural Mailboxes Stratford Plastic Mailbox and Post Kit, SC000BAM, Black, Medium Capacity

9.5

9.1

8.9

How do we rank?

How do we rank?

Analyzing top stores

2

ARCHITECTURAL MAILBOXES Grand Haven Plastic, Mailbox and Post Kit, Black Extra Large

9.5

8.4

8.4

3

Architectural Mailboxes Parsons Medium Capacity, Plastic Post Mount Mailbox, Black

9.3

9.1

9.1

4

Architectural Mailboxes Newbury™ Rust-Proof Plastic Post Mounted Mail Box for Outside with Post, Mocha, Medium Curbside Mailbox, USPS Approved for Residential Delivery

9.9

9.7

9.5

5

Gibraltar Mailboxes Patriot Large Capacity Rust-Proof Plastic Black, Post-Mount Mailbox, GMB515B01

9.9

9.9

9.9

6

Step2 MailMaster Plus Mailbox & Post, Weather Resistant, Large Outdoor Mailboxes, Made of Durable Plastic, Easy to Install, Flag Included, Black

9.9

9.7

9.7

7

Architectural Mailboxes Classic Plastic, Dual Access, Mailbox and Post Kit, GCL100BAM, Black, Medium Capacity

9.5

9.3

8.4

8

Architectural Mailboxes Patriot Plastic Post Mount Mailbox, Compatibility Code E, GMB505BAM, Black, Medium Capacity

9.7

9.5

9.3

9

Architectural Mailboxes Whitley Plastic Mailbox Post, Compatibility Code A, B, C, WP000WAM, White

8.7

8.2

8.0

10

Step2 Town-to-Town XL Post-Mount Mailbox, Weather Resistant, Large Outdoor Mailboxes, Made of Durable Plastic, Easy to Install, USPS T4 Sized Mailbox, Flag Included, Onyx Black

9.7

9.7

9.3

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