The Register of Electors for 2018-2019 came into force on 15 February 2018. You can check to see if your name is on the Register.
If you are eligible to vote but are not on the Register of Electors, you can apply to be included in the supplement to it.
You can apply at any time. However, you can only be included in the supplement used at the referendum on 25 May 2018 if your local authority receives your application by Tuesday 8 May 2018.
If you wish to be included in the supplement to the Postal Voters List or the Special Voters List in time to vote in the referendum, the local authority must receive your application by Saturday 28 April 2018.
All application forms are available on checktheregister.ie and from your local authority.