India is home to the second largest group of Google+ visitors of any country, accounting for 2.8 million, or 27%, of the world's 20 million Google+ visitors.
With 5.3 million cumulative unique visitors to Google+, the US has the highest number of Google+ users, market researcher comScore shows.
In the US, 63% of Google+ visitors are male and more than half are between the ages of 18 and 34.
The US may be home to the majority of early Google+ adopters, but what is interesting about the social network's exponential growth "is its proliferation on a global basis," commented comScore's Andrew Lipsman in a July 22 post on the company's blog.
According to comScore's statistics, 867,000 people in the UK visited Google+ during the first 21 days of public existence, putting the country in third place behind the US and India.
Canada (859,000 visitors), Germany (706,000 visitors), Brazil (622,000), Taiwan (515,000 visitors), France (498,000 visitors), Turkey (373,000 visitors) and Spain (365,000 visitors) made up the remaining top ten countries.
ComScore speculated about whether or not the social network was the fastest growing site in history, writing that, "It would be difficult to think of many sites that reached such a large number in such a short period of time. That said, Google does have a built-in visitor base of more than 1 billion to work with, so there is clearly potential to convert a high number of users to its new social tool -- even if it is still invite-only."
Lipsman noted that "these data are based on unique visitors (which is different than 'users' in that people who never sign up may visit Google+ pages) from home and work computers (which excludes usage via mobile devices)."
While Google+ has grown from strength to strength over the last couple of weeks, 750-million strong Facebook has been plagued by a never-ending onslaught of video scams and privacy misdemeanors.
Google+ is not without its own faults, however, and has recently come under fire for suspending the Google accounts of people who don't use their real names within the social network.