Among those being remembered are two people from the midlands.
An online ceremony is taking place today for the 800 people in Ireland who remain missing.
It's the eighth annual National Missing Persons Day.
Among those being remembered are Tullamore's Fiona Pender, who was last seen in August 1996, and 33 -year-old Peter Wilson from Rochfortbridge, who went missing while on holidays in Tenerife in March 2019.
The all-island event is a chance for families to talk about their loved ones and appeal for any information which may try to resolve the cases.
Ploughing 2026 Day Two: As It Happened
There Are Very Strict Rules When It Comes To International Sport - Tanaiste
Terminating A Pregnancy Is Not An Easy Or Quick Decision - Sorca Clarke
Three Day Abortion Waiting Period Under Scrutiny In Leinster House
An Post Opens Recruitment For 1,600 Christmas Workers
Initiative Tackling Drug Related Intimidation Gets Funding Boost
Westmeath GAA Star Raises Concerns Over Future Of Irish Farming
Westmeath Market House Redevelopment Could Begin Construction By December