mailbox lock
Skip itA concentrated shelf (top 5 take 86% of clicks) — this niche doesn't clear our bar today.
Conversion
Great10.8%search→purchase rate — share of searches ending in a sale
Review moat
Good999.44avg incumbent reviews — the moat a new listing must climb
Returns
Good2.7%return rate — above 5% kills the launch gate
Market size
Good$278K$278K/yr · 243K searches
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Avg price
Okay$10.59avg listing price — sweet spot $15–$100
Price range
Okay$6.89–$19.19cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Okay89%top-5 brand share — brands hold most of the demand
Growth
Bad-3.9%90-day search growth — must beat 0% to launch
Competition
Bad86%top-5 click share — a locked-up shelf
According to Flapen's Amazon United States niche tracking, mailbox lock is a $278K/yr Amazon United States market (243K searches/yr). The top 5 brands hold 89% of demand. Verdict: Skip it — 41/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
mailbox lock market data
- Units sold / yr
- 30K–40K
- avg 2,500–3,000/product
- Revenue / yr
- $318K–$424K
- units × avg price
- Conversion rate
- 10.8%
- Avg BSR
- #17
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 89%
- Out of stock
- 0.0%
- Avg brand age
- 42 months
- Avg seller age
- 156 days
Competition & brand share
The top 5 products capture 86% of clicks — a locked-up shelf that new listings rarely crack.Brands
8 falling
Sellers
58
Top-5 brand share
89%
Top 20: 100%
Top-5 click share
86%
Top 20: 100%
Open market
5%
- VIXAVI48%
- PRIME-LINE12%
- QBXMY711%
- COMPX NATIONAL10%
- Yandino7%
- CYMGJHNSDE6%
- Open — no brand owns it (2 brands, 5%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -3.9% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.2×
Top mailbox lock search terms
- mailbox lock79K/yr
- mailbox lock replacement22K/yr
- mail box lock and key26K/yr
- mailbox locks19K/yr
- mailbox locks with keys replacement25K/yr
- mailbox key11K/yr
- mailbox key lock replacement8K/yr
- mail box lock9K/yr
- mailbox locks with keys10K/yr
- usps mailbox lock replacement5K/yr
Top mailbox lock products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 9 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Mailbox Lock Replacement - Universal Mailbox Locks with 4 Keys - Easy to Install Mail Box Lock and Key Set - Durable and Secure Lock Replacement with 4 Keys for Almost All Locking Mail Boxes
VIXAVI$9.804.5★526 rev
Mailbox Lock 16 mm Comes with 4 Different Lock Plates
QBXMY7$6.894.6★176 rev
COMPX NATIONAL USPS-L-1172C National Mailbox Lock C9100 (Lock with 3-Keys)
COMPX NATIONAL$19.194.6★1,380 rev
Prime-Line S 4140 Mailbox Lock Replacement Multipurpose Lock for Several Brands ILCO 1003M Keyway Opens Counter-Clockwise with 90 Rotation Nickel Finish (1 Set)
PRIME-LINE$9.384.4★3,939 rev
Mailbox Lock Replacement with 4 Keys - Multipurpose Mail Box Locks Compatible with Almost All Brands - Universal Lock Pick Set - File Cabinet Lock - Durable and Secure
Yandino$7.994.4★159 rev
Newest
by launch date
Mailbox Lock(2 Pack) Universal Front Door & Curbside Mailbox Locks with Keys Replacement - Easy to Install Mail Box Lock with 2 Keys Set Almost All Locking Mail Boxes Durable and Secure (2)
CYMGJHNSDE$9.7839 rev
Mailbox Lock Replacement with 4 Keys - Multipurpose Mail Box Locks Compatible with Almost All Brands - Universal Lock Pick Set - File Cabinet Lock - Durable and Secure
Yandino$7.99159 rev
Mailbox Lock 16 mm Comes with 4 Different Lock Plates
QBXMY7$6.89176 rev
Mailbox Lock Replacement - Universal Mailbox Locks with 4 Keys - Easy to Install Mail Box Lock and Key Set - Durable and Secure Lock Replacement with 4 Keys for Almost All Locking Mail Boxes
VIXAVI$9.80526 rev
1 Pack Mailbox Lock with Key Mailbox Lock Replacement for L-1172C Mailbox Key Lock Nickel Finish
Ymtzfu$16.14111 rev
Trending
90-day click momentumMailbox Lock(2 Pack) Universal Front Door & Curbside Mailbox Locks with Keys Replacement - Easy to Install Mail Box Lock with 2 Keys Set Almost All Locking Mail Boxes Durable and Secure (2)
CYMGJHNSDE$9.784.5★
Mailbox Lock 16 mm Comes with 4 Different Lock Plates
QBXMY7$6.894.6★
Mailbox Lock Replacement - Universal Mailbox Locks with 4 Keys - Easy to Install Mail Box Lock and Key Set - Durable and Secure Lock Replacement with 4 Keys for Almost All Locking Mail Boxes
VIXAVI$9.804.5★
COMPX NATIONAL USPS-L-1172C National Mailbox Lock C9100 (Lock with 3-Keys)
COMPX NATIONAL$19.194.6★
Hecfu 1 Pack Cabinet Locks with Keys 5/8 Cam Lock keyed Alike Secure Drawer File Cabinet Mailbox Lock Replacement RV Storage Locks Zinc Alloy
Hecfu$8.484.6★
What buyers say about mailbox lock
What buyers praise and complain about, mined from review topics.What buyers love
“Great lock, easy”
“Installed perfect and works perfect”
“Fit perfect”
“Good quality”
“Great Value”
“As advertised”
“Easy to use”
“Works very well”
“The build feels solid”
“Seems durable”
What buyers complain about
“Terrible lock”
“just a tad smaller”
“Did not fit”
“They break easy”
“become difficult to use after a period of time”
“I almost sent it back because I couldnt figure out how to get it to work”
“Cheap quality also needed to placed order again missing clips to hold lock”
“The keys are a little rough”
“Super hard to install”
“Didn't work”
Top return reasons
Common questions
- Is mailbox lock profitable to sell on Amazon United States?
- The niche generates $278K/yr across 9 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -3.9%. Flapen's verdict: Skip it (41/100).
- How competitive is the mailbox lock niche?
- 8 brands and 58 sellers compete. The top 5 products take 86% of clicks and top 5 brands hold 89% of demand.
- What do buyers complain about in mailbox lock?
- Top complaints mined from reviews: Locking Mechanism, Size-Overall, Compatibility-Overall. The return rate is 2.7%.
- When does demand for mailbox lock peak?
- Demand is steady year-round — the busiest month runs 1.2× the quietest.
- What does it cost to enter the mailbox lock niche?
- Listings span $6.89–$19.19; the average listing price is $10.59 (sweet spot $15–$100). The average incumbent carries 999 reviews — the moat a new listing must climb.