Google+ Audience Tops 5 Million in US, 2.8 Million In India

New data from comScore estimates that Google+ has had 20 million unique visitors from launch (June 29) through July 19, an increase of 82% from the previous week and 561% from two weeks prior. The U.S. audience recently surpassed 5 million visitors, up 81% from the previous week and 723% from two weeks earlier. The top 5 countries using the network are the US, India (a strong second with 2.8 million unique visitors), Britain, Canada and Germany.

Surprisingly, the US only accounts for 27% of the Google+ worldwide audience.

Web analytics firm Experian Hitwise recently released data measuring Google+’s growth, from its launch in late June through July 16th.  Turns out the network is not as male-dominated as early estimates had us believe, but it is clearly dominated by young adults, with the 25-34 age bracket accounting for 38% of all visitors.

Here are highlights from the Experian Hitwise report, as compiled by Mashable:

  • Google+ is the 42nd most-visited social networking site in the U.S.
  • Google+ is the 638th most-visited site on the web
  • Google+ had 1.8 million total visits last week, an increase of 283% from the previous week
  • Google+ grew by 821% since the week ending on July 2 (the first week Google+ was made available)
  • 57% of visits to Google+ were from males for the weeks from launch until July 16
  • the metropolitan areas driving the most traffic to Google+ are Los Angeles, NYC, and San Francisco

Traffic to Google+ is largely driven by Google sites. The majority (56%) of Google+’s upstream traffic came from other Google properties last week – 34% of it from Google.com. And 37% of the network’s upstream traffic came from search engines, while 21% of its traffic was driven by email.

The Washington Post reports that Google+ has “proven to be the fastest-growing social media platform in history before it’s even officially launched or has worked out how to leverage the network for businesses and brands.”

While there have been some reports over the last few days that the growth rate for Google+ is slowing down, access to the social network is still by invitation only. Numbers will most likely rise dramatically again once Google+ opens to the public, or if the service is marketed directly to the over one billion monthly visitors that use Google for search, Gmail, or other Google services.