A shop in Co Meath sold the winning ticket in the €8.9 million Lotto draw on Wednesday night.
The National Lottery confirmed the winning ticket was sold at Lowthe’s Londis shop in Duleek.
It also said on Thursday evening it was still waiting to hear from the winning ticket holder.
It urged Lotto players in the county to check their tickets to see if they are Ireland’s 8th Lotto jackpot winner of the year.
The winning numbers for Wednesday’s draw were 3, 8, 20, 24, 28, 29 and the bonus was 40.
The winner is advised to sign the back of their ticket and to keep it safe.
“The winner should make contact with the National Lottery prize claims team on 1800 666 222 or email email@example.com and arrangements will be made for them to claim their prize,” the National Lottery said in a statement.