Based on figures provided by the Adoption Authority of Ireland, there has been over 44,000 adoptions in Ireland since the commencement of the Adoption Act 1952. 72 adoption orders were granted in 2018. The Authority advise that there is no data on the number of individuals that also had a sibling placed for adoption.
The Adoption Authority of Ireland operates the National Adoption Contact Preference Register (NACPR). The NACPR was set up in 2005 as a way for people affected by adoption to make their wishes known about having contact with their birth family members. Where a match is made on the register between two people seeking contact (including siblings) the individuals will be put in contact with each other.