India is among the top three fastest growing Internet markets in the world, a study by industry body Assocham and ComScore said.
"Among the BRIC nations, India has been the fastest growing market adding over 18 million Internet users and growing at an annual rate of 41%," it said.
The Internet user base in the country is approximately 125 million, the study added.
"China added over 14 million users to reach 336 million Internet users by the end of July 2012. Russia and India show similar trends in online usage patterns along with similarities in e-commerce and payment types," it said.
"Interestingly, about 75% of online audience between the age group of 15-34 years, India is one of the youngest online demographic globally," Assocham secretary general DS Rawat said.
He said the trend is expected to continue in coming yearsgiven the age distribution in the country.
Among age groups, 15-24 years is the fastest growing age segment online. The top five categories accessed online are social networking, portals, sear-ch, entertainment and news.