B
Evidence Grade B
Graded
under review
Safe to Cite
Current
40%
40% -- ecommerce market share for Amazon (US ecommerce market) (2026)
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
40%
Unit
Percentage
Data Vintage
2026
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
50
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
salesupply.co.uk
Primary
Tier C
https://www.salesupply.co.uk/blog/how-to-sell-internationally-on-amazon/ ↗
Source Article
How to sell internationally on Amazon - Salesupply
It’s well-known that Amazon continues to dominate the ecommerce market across the globe, with the US offering a relevant case in point.
More specifically, Amazon accounts for nearly 40% of the ecommerce market in the US, with 31% comprising the following 14 biggest online stores operating stateside …
Original Research
salesupply.co.uk
· Original study ↗
Methodology
Secondary citation in vendor blog; original source not named
Methodology documented
Trend Over Time
| Period | Value | Change |
|---|---|---|
| 2020 | 47% | |
| 2026 (current) | 40% | -14.9% |
Segmentation
Industrymarketing
Cite this stat
Plain Text
Amazon (US ecommerce market): 40% ecommerce market share. Source: salesupply.co.uk (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/amazon-us-ecommerce-market-share
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<blockquote cite="https://lighthousedata.io/data/amazon-us-ecommerce-market-share" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>40%</strong> -- ecommerce market share for Amazon (US ecommerce market)<br><small>Source: salesupply.co.uk (2026) · <a href="https://lighthousedata.io/data/amazon-us-ecommerce-market-share" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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