In 2010, Cardiff, the Vale of Glamorgan and Monmouthshire, seven out of ten of the adult population were internet users.
In Blaenau Gwent, Merthyr Tydfil, Neath Port Talbot and Rhondda Cynon Taf, rates were around six out of ten.
Ongoing research has found negative consequences to not having personal access to the internet, including being disadvantaged while seeking employment through lack of access to opportunities, and being excluded from quick access to educational information.
Those with access can also better communicate and keep in touch with other people through email and social networking sites.
Minister for Finance and Leader of the House, Jane Hutt said: "The digital inclusion agenda is an increasingly important one as individuals who do not use the internet are likely to become increasingly economically and socially excluded."
Hutt, has also announced the launch of a 'Stakeholder's Forum' intended to encourage a continual increase in the number of internet users in Wales.
The forum will attract users from all over the private, public and third sectors with an interest in the subject, to join and discuss ways to encourage and enable more people to get online.