Up from 99.8 per cent last year, 100 per cent of Iceland's 331,778-strong population are now classified as internet users - someone who can access the internet "at home, via any device type and connection".
By comparison, Australia is sitting at 85.1 per cent, up from last year's 84.8 per cent.
According to Internet Live Stats, the data for the calculations is derived from the International Telecommunication Union (ITU), World Bank, and United Nations Population Division.
The country with the biggest growth is India, which despite having the most internet-less people in the world (864,676,587), had internet penetration in the country go up by 30.5 per cent in the last year. The country with the least growth is the European nation of Andorra, who decreased its internet penetration by -1.6 per cent.
China has the most internet users overall, 721,434,547 representing just over half of its population, while Marshall Islands has the least - 10,709 people or 20.2 per cent of the total population.