Councillor Pippa Hackett of the Green Party will become a senator next month after no other candidate was nominated to contest the byelection for the Upper House.
The Ballindine native, who is an Offaly councillor and the party’s agriculture spokeswoman, was the only candidate to submit a nomination for the seat which was vacated by her party colleague Grace O’Sullivan.
Ms O’Sullivan was elected to the European Parliament in May.
The other political parties decided not to nominate any other candidate.
Ms Hackett runs the family farm, which specialises in organic beef, in Geashill, Co Offaly, with her husband Mark.
They have four children, aged 8 to15.
A native of Ballindine, Co Mayo, Ms Hackett studied agriculture in Essex.