comScore released a report today on the top global retail and auction sites, finding that Amazon sites were visited by one in five global Internet users in June – more than any other in the category.

Amazon sites received visits from over 282 million visitors in June, according to the report. That’s 20.4% of the world’s Internet population.

“While retail e-commerce has already grown to become a $150+ billion annual industry in the U.S., it still presents enormous upside opportunity across much of the globe,” said comScore co-Founder and Chairman Gian Fulgoni. “Technology has changed the way consumers behave, and increasingly they are opting for the convenience and pricing advantages offered by the online channel. Several global retail brands have already capitalized on this global consumer trend, and many other retailers are sure to pursue their share of the pie.”

eBay came in second behind Amazon at 16.2% of global Internet visitors, though PayPal is becoming an increasingly major factor in eBay’s overall business strategy.

Alibaba reached 11.3% of Internet users, Apple reached 9.7%, and Rakuten reached 4.2%.

As you can see from the above charts, Amazon attracted 35.4% of its audience from North America. Europe accounted for 31.8% and Asia Pacific accounted for 24.1%.

In its most recent earnings report, Amazon announced a sales increase of 51% year-over-year.