They were last seen on Main Street, Swords in Dublin yesterday afternoon.
A mother and her four children have been missing from their home in Roscommon for eight days.
Gardaí are asking for the public's help in finding 32-year-old Martina Ward from Ballaghaderreen.
She and 5-year-old Charlie, 4-year-old Edward, 2-year-old Tom and 10-month-old Emily were last seen on Main Street, Swords in Dublin yesterday afternoon.
Gardaí say they've ongoing concerns for the well-being of Martina and her four children.
Anyone with information on their whereabouts are asked to contact Balbriggan Garda Station on 01 802 0510, the Garda Confidential Line on 1800 666 111 or any Garda station.