London has been named the best connected city in the world by the Wireless Broadband Alliance (WBA).
However, a study carried out for World Wi-Fi Day found that eight per cent of people in the UK capital still do not have access to broadband.
This works out to more than 600,000 residents of the capital and is reflective of a wider trend in major urban heartlands.
Indeed, figures showed that 57 per cent of the urban population across the world are still not connected.
More than a third of these individuals were found to be living in some of the world's wealthiest cities, such as London.
Shrikant Shenwai, Chief Executive of the WBA, commented: "There is a clear divide between the digital haves and the digital have-nots.
"And while this divide generally mirrors socio-economic trends around the world, there are surprisingly high levels of urban unconnected citizens in major cities."
Mr Shenwai has therefore called on cities, governments, operators and major technology companies to work together to tackle this problem.
He argued that collaboration between all these stakeholders would help to deliver affordable and sustainable connectivity "for everyone everywhere".
Nearly one in five residents of major European cities were found to be without internet access, along with almost a quarter of city dwellers in North America.
The proportion of unconnected citizens in cities was highest in the Middle East and Africa, with the figure coming to 82 per cent.
Meanwhile, 68 per cent of city residents in the Asia Pacific area were found to be without broadband, along with 55 per cent of their counterparts in Latin America.