In a survey, the ONS says education plays a key role as to whether people have web access in their homes or not.
Almost all adults (93%) aged under 70 who had a degree or equivalent qualification were estimated to have access to the internet in their home.
Data from the ONS Internet Access 2008: Households and Individuals report, showed that those individuals who had no formal qualifications were least likely (56%) to have a web connection at home.
The survey also revealed households in the South East were more likely to have internet access in their home (74%), whilst those in the North East were least likely (54%).
Of adults living in households with no internet access, there has also been a significant increase in the proportion who stated they did not want the internet in their homes. This increased from 3% in 2006 to 24% in 2008.
Almost 16.5 million households in the UK had internet access in 2008. This represents nearly two-thirds of the total households in the UK, and a rise of more than 1.2 million since 2007, said the ONS report.