Irish women from both sides of the Border travelled to England and Wales for 25,000 abortions in the past five years – an average of 100 terminations a week.
Most were carried out in Manchester.
The information was obtained from the Department of Health in Whitehall by the Belfast-based journalism project Detail Data.
The information includes details about the age of the women undergoing the terminations and where in England and Wales they were carried out.
In all, 19,947 girls and women from the Republic of Ireland and 4,652 from Northern Ireland travelled to the UK for terminations between 2010 and 2014.
The most used clinic was in Manchester, to which 46 per cent of women and girls from the Republic and 41 per cent of those from Northern Ireland travelled.
Thirty per cent of the Manchester abortions took place at the city’s Marie Stopes clinic.
Detail Data acknowledges that the statistics it has used only apply to those women and girls who gave their addresses in Ireland and Northern Ireland – in reality, many use a local UK address.
This means that in all probability the numbers of Irish women having abortions at English and Welsh providers is actually higher.
The figures include girls under the age of 16, 152 from the Republic and 69 from Northern Ireland.
The cost of abortions clinics is estimated at between £400 and £1,500.
Abortions are only legal in Northern Ireland if a woman’s life is at risk or if there is a risk of a serious long-term effect on her physical or mental health.
Abortion in Ireland is illegal under the eighth amendment to the Constitution, except in circumstances where there is a real and substantial risk to a mother’s life.
Where there is a suicide risk expert opinion from a number of sources must be sought.