Public bikes are now operating in Dublin, Belfast, Cork, Galway and Limerick
More than 2.3 million journeys were taken on public bikes in the first half of 2016.
The figures released today include the public bike schemes in Dublin, Cork, Galway, Limerick and Belfast.
The vast majority of those - 2.08 million - were made on the public bikes in Dublin, bringing the total number of journeys on the capital's bike scheme to 15,495,774 since 2009.
An additional 3,600 subscribers joined the scheme during the first half of the year.
164,014 journeys were taken across Cork, Galway and Limerick, while there were 97,000 trips in Belfast.
Altogether, there was an average of almost 13,000 journeys a day on public bikes.
Brendan Kenny, Chief Executive of Dublin City Council, said: “The 15.5 million journeys taken since the scheme launched in Dublin in 2009, shows the huge success of the scheme itself and its promotion as a healthier, affordable and environmentally sustainable transport option.
"With cycle-friendly initiatives like the Port Tunnel, HGV strategy and various infrastructural cycleway improvements, cycling is commanding a higher mode share than ever before."
Anne Graham, CEO of the National Transport Authority, added: "The statistics released today reflect the immense progress that has been made to date and we are ambitious for the future of the schemes in Cork, Galway and Limerick, with new users signing up all the time."
Dublin City Council confirmed earlier this month that a planned extension of the Dublin Bikes scheme has been postponed pending further funding.
The council spent €376,211 on the scheme in 2015. A further €312,000 in sponsorship is provided every year by Coca Cola, who also support the other schemes across the country.