The International Telecommunication Union (ITU), a United Nations body, predicts that 3.2 billion people will be online. The population currently stands at 7.2 billion.
About 2 billion of those will be in the developing world, the report added.
But just 89 million will be in countries such as Somalia and Nepal.
These are part of a group of nations described as “least developed countries” by the United Nations, with a combined population of 940 million.
There will also be more than 7 billion mobile device subscriptions, the ITU said.
It found that 78 out of 100 people in the US and Europe already use mobile broadband, and 69% of the world has 3G coverage – but only 29% of rural areas are served.
Read more at the BBC.