In order to be included on the Register of Electors:
Every resident aged 18 and upwards is entitled to be on the register.
Students living away from home while attending college have the choice of being registered at either their home address or their student residential address.
If you are pursuing a course of study on a full-time basis at an educational institution in the State and because of this study you are unlikely to be able to go to your polling station on polling day to vote, you may apply to your registration authority to be included in the Postal Voters List and to vote by post at elections and referenda.
If you are an Irish citizen living abroad you cannot be entered on the Register of Electors.
This means that you cannot vote in an election or referendum here in Ireland. (The only exception to this is Irish diplomats (and their spouses) on duty abroad and members of the Defence Forces who may cast their vote by post).