Best Plastic Security Mailboxes in 2026
Daisy
Last Updated: Feb 9, 2026
Daisy
Last Updated: Feb 9, 2026
* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
This mailbox is made with corrosion-resistant, high grade stainless steel with a Matte finish
Large mailbox size: 12.5 inch w x 18.5 inch H x 5.5 inch D will hold several days of mail
Heavy duty lock with 2 keys adds security
Incoming mail slot opening is 10.25 inch long and 1” wide and will fit most envelopes and magazines but keep unwanted hand out
Mounting hardware not included. If mounting to a masonry wall, use masonry mounting screws with masonry anchors (at least 1-1/2 inch long)
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
This scratch resistant Black powder coated steel mailbox has a peaked roof
Large mailbox size: 15.5 inch w x 13.5 inch H x 7.5 inch D will hold several days of mail
Heavy duty lock with 2 keys adds security
Incoming mail slot opening is 12.875 inch long and 1.5” wide and will fit most envelopes and magazines but keep unwanted hand out
Mounting hardware not included. If mounting to a masonry wall, use masonry mounting screws with masonry anchors (at least 1-1/2 inch long)
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Convert your non-locking lewiston mailbox into a locking mailbox
The locking box secures inside of your lewiston mailbox
Incoming mail slot opening: 6 3/8 inch Width and 1” height. Locking door opening: H 5”x w 6 3/8 inch
Adds security to keep mail out of reach from unwanted hands
Comes with heavy duty lock and set of keys. Made of powder coated steel
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
High security locking curbside mailbox and post made of steel and powder coated to resist tough weather
Convenient Outgoing tray is also an internal baffle to help keep unwanted hands from reaching into the mail storage area
This large capacity mailbox accepts larger pieces of mail and small packages
The incoming mail slot measures: 10 inch wide x 1-3/4 inch high. Outgoing tray is 10 inch wide x 6 inch deep
Post is 48 inch tall x 3 inch diameter and can be direct buried
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| UnbeatableSale, Inc | 9.83 | ❌ | ❌ | ❌ |
This scratch resistant powder coated steel mailbox has a gray body, black top and red door
Large mailbox size: 11 inch w x 15.5 inch H x 5.5 inch D will hold several days of mail
Heavy duty lock with 2 keys adds security
Incoming mail slot opening is 8.625 inch long and 1.125” wide and will fit most envelopes and magazines but keep unwanted hand out
Mounting hardware not included. If mounting to a masonry wall, use masonry mounting screws with masonry anchors (at least 1-1/2 inch long)
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Cast Aluminum powder coated will not rust and is scratch resistant
Decorative fluted base
Ball finial mounts to top of post
Mailbox 8-1/2" x 1" x 2". 3" OD direct burial pole height 5' 2"
Add our Lewiston Locking Mailbox Conversion Kit for added security Amazon # B01KSELS4O
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Single post with Lewiston mailbox, square base and pineapple finial
Add our Lewiston Locking Mailbox Conversion Kit for added security Amazon # B01KSELS4O
Protective, weather-resistant Bronze powder coated finish. Made from solid cast aluminum and steel
Mailboxes can be mounted on the side or front of the post. Lewiston mailbox: 8 inch x 10 inch x 19 inch
Dimensions: 9L x 36W x 56H inches weighs: 28 lbs. 4 inch aluminum square post
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Scratch resistant black powder coated steel body and a stainless steel letter flap and door
Large mailbox size: 11.5 inch w x 14.5 inch H x 5.5 inch D will hold several days of mail
Heavy duty lock with 2 keys adds security
Incoming mail slot opening is 11.375 inch long and 1.375” wide and will fit most envelopes and magazines but keep unwanted hand out
Mounting hardware not included. If mounting to a masonry wall, use masonry mounting screws with masonry anchors (at least 1-1/2 inch long)
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| stores123 | 9.87 | ❌ | ❌ | ❌ |
Cast Aluminum powder coated will not rust and is scratch resistant
Decorative fluted base
Ball finial mounts to top of post
Mailbox 8-1/2" x 1" x 2". 3" OD direct burial pole height 5' 2"
Add our Lewiston Locking Mailbox Conversion Kit for added security Amazon # B01KSELS4O
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Convert your non-locking Manchester column mount mailbox to a locking mailbox
The locking door and plate fit inside of the faceplate and attach to the faceplate and masonry can of the mailbox
Made of powder coated steel
Adds security to keep mail out of reach from unwanted hands
Comes with lock and set of keys
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| stores123 | 9.87 | ❌ | ❌ | ❌ |
Install a security chute that drops your mail to a locking rear door, ensuring easy retrieval when mounted in a column or wall
Have peace of mind knowing that your mail is secured in your Manchester mailbox
16 gauge steel masonry box is electro-galvanized and powder coated inside and out to last a lifetime
Faceplate dimensions: 11 x 14 x 1-3/4 inches
Box dimensions: 8-1/2 x 11-1/2 x 15 inches
Keeps mail out of reach from unwanted hands
Features a cast aluminum faceplate and locking chute
Sealed from the weather aliments
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Single post with Lewiston mailbox and pyramid finial
Add our Lewiston Locking Mailbox Conversion Kit for added security Amazon # B01KSELS4O
Protective, weather-resistant Black powder coated finish. Made from solid cast aluminum and steel
Mailboxes can be mounted on the side or front of the post. Lewiston mailbox: 8 inch x 10 inch x 19 inch
Dimensions: 9L x 36W x 56H inches weighs: 28 lbs. 4 inch aluminum square post
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| VirVentures | 9.95 | ❌ | ❌ | ❌ |
Single post with Lewiston mailbox, square base and pyramid finial
Add our Lewiston Locking Mailbox Conversion Kit for added security Amazon # B01KSELS4O
Protective, weather-resistant Black powder coated finish. Made from solid cast aluminum and steel
Mailboxes can be mounted on the side or front of the post. Lewiston mailbox: 8 inch x 10 inch x 19 inch
Dimensions: 9L x 36W x 56H inches weighs: 28 lbs. 4 inch aluminum square post
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| VirVentures | 9.95 | ❌ | ❌ | ❌ |
Decorative mailbox only (no address plates)
Mailbox is post mount and made of rust-free cast aluminum with a tough powder coat weather resistant finish
Dimensions. 10' high, 8" wide 20 " deep weighs 13 lbs
Finish: Black
Add our Lewiston Locking Mailbox Conversion Kit for added security Amazon # B01KSELS4O
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Single post with Lewiston mailbox, square base and large ball finial
Add our Lewiston Locking Mailbox Conversion Kit for added security Amazon # B01KSELS4O
Protective, weather-resistant Black powder coated finish. Made from solid cast aluminum and steel
Mailboxes can be mounted on the side or front of the post. Lewiston mailbox: 8 inch x 10 inch x 19 inch
Dimensions: 9L x 36W x 56H inches weighs: 28 lbs. 4 inch aluminum square post
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| VirVentures | 9.95 | ❌ | ❌ | ❌ |
Mount in masonry walls and columns chute adjusts to match the thickness of your wall
Castings are made in solid aluminum and top quality black enamel finish. Manufactured in England
Large capacity, secure mail storage with rear lockable door supplied with 2 keys
Rear access door opening: 7" w x 7.5" h incoming opening dimensions: 9"w x 2.5" h overall product dimension: h 16.5" x w 11.5" x d 14" weight 18 lbs.
Optional anti-theft high security plate can be added to decrease opening front slot to 9" x 1" order item # hs-plate
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Single post with Lewiston mailbox and Urn finial
Add our Lewiston Locking Mailbox Conversion Kit for added security Amazon # B01KSELS4O
Protective, weather-resistant Bronze powder coated finish. Made from solid cast aluminum and steel
Mailboxes can be mounted on the side or front of the post. Lewiston mailbox: 8 inch x 10 inch x 19 inch
Dimensions: 9L x 36W x 56H inches weighs: 28 lbs. 4 inch aluminum square post
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| VirVentures | 9.95 | ❌ | ❌ | ❌ |
Single post with Lewiston mailbox, square collar and pyramid finial
Add our Lewiston Locking Mailbox Conversion Kit for added security Amazon # B01KSELS4O
Protective, weather-resistant White powder coated finish. Made from solid cast aluminum and steel
Mailboxes can be mounted on the side or front of the post. Lewiston mailbox: 8 inch x 10 inch x 19 inch
Dimensions: 9L x 36W x 56H inches weighs: 28 lbs. 4 inch aluminum square post
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Qualarc | 18 |
We've carried out a comprehensive analysis of 304 reviews on security mailboxes, using our selection criteria to identify the best options in the categories. Our findings reveal that most customers typically select security mailboxes priced around $374.31, with top brands including and
Our team of expert editors reviewed these high-quality items and handpicked the top 18 security mailboxes for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the categories category. These include and .
We are dedicated to assisting our users in finding the right mailboxes Products based on their needs, saving them considerable time when choosing which security mailboxes to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.
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