Broadband subscriptions increased by 3.1% to over 1.3 million in the second quarter of this year, according to ComReg.
While the pace of increased subscriptions has declined, broadband penetration stood at 29.5 subscribers per 100 of population at the end of June.
That figure falls to 21.1 when mobile broadband subscribers are taken out of the equation.
The communication watchdog's quarterly report shows that just over two-thirds of Irish households now have a broadband connection, but also showed that revenue and voice traffic declined in Q2.
Overall market revenues were down by 4% to just over €1.01 billion, while voice traffic minutes fell by 1.2% to 4.6 billion minutes.
There has been a further decline in the number of homes and businesses using dial up connections, down by 21% in the time period covered in this report, to just under 160,000.
Calls from mobile phones now account for 55% of all voice traffic and the number of texts sent continued to increase between April and June. Over three billion texts were sent, an average of 194 per month, from every phone in the country.
The report's findings were welcomed by Communications Minster Eamon Ryan.
'In two years, we have doubled our broadband subscriptions, with higher speeds and lower costs now available. Broadband policy, focused on increased investment and competition in the market, is delivering results,' he said.
'Over two-thirds of Irish homes have a broadband connection. While the majority of homes can now connect, the National Broadband Scheme is addressing those that cannot.
'Speeds are also improving, with almost 70% of customers now availing of faster broadband,' he added.
