The writs have been moved for four Dáil by-elections.
People will go to the polls on November 29th in Dublin Mid-West, Dublin Fingal, Cork North Central and Wexford.
It is to replace the TDs elected to the European Parliament in May.
Clare Daly, Frances Fitzgerald, Billy Kelleher and Mick Wallace were all TDs before being elected as MEPs.
The votes later this month come ahead of an expected general election next year.
Taoiseach Leo Varadkar told a Cabinet meeting last week that he will not go to the polls before Christmas.
He had been under pressure from some ministers to dissolve the Dáil after British MPs in the UK backed a general election on December 12th.
However, citing the continued Brexit uncertainty, Mr Varadkar he didn't think it would be in the country's interest "for us to be spending potentially weeks and months trying to put together a new government at such a crucial time".
He has previously mentioned May 2020 as his preferred election date.
CONFIRMED: Four by-elections to be held on November 29th in Dublin Fingal, Dublin Midwest, Cork North Central and Wexford after the Dáil passes moving of the writs
— Seán Defoe (@SeanDefoe) November 7, 2019
Newstalk's political correspondent Sean Defoe's guide to this month's by-elections:
We are getting a November election! Just not quite the election some in Fine Gael had imagined.
The writs have been issued for four by-elections to replace the TDs that were elected to the European Parliament in May.
Clare Daly, Frances Fitzgerald, Mick Wallace and Billy Kelleher all left vacant Dáil seats.
People in Dublin Mid West, Dublin Fingal, Cork North Central and Wexford will vote for new TDs on November 29th.
None of the constituencies are entirely clear cut, and by-elections tend to take on a life of their own.
With that in mind here's a quick look at how the races might shape up.
WEXFORD
Wexford is the most apparently clear cut with it seeming to be a two horse race between Fianna Fáil and Fine Gael.
Fianna Fáil's Gorey-based councillor Malcolm Byrne is seen as the clear favourite after pulling almost 70,000 votes in the European elections, when he placed 7th in Ireland South.
His most obvious challenger is Fine Gael's Verona Murphy, the head of the Irish Road Haulage Association. She's based in the New Ross end of the constituency but will draw support in Rosslare as well.
Sinn Féin's Johnny Mythen polled well in 2016 but lost his council seat in May. Labour is running Cllr George Lawlor and the Green Party has selected environmental activist Karin Dubsky.
Jim Codd for Aontú probably has the best slogan of the candidates - give Codd the Nod.
Cinnamon Blackmore is the People Before Profit candidate, who wins the title of best name on the ballot.
DUBLIN FINGAL
The Fianna Fáil candidate is also seen as the favourite in Dublin Fingal.
Senator Lorraine Clifford Lee polled well in 2016 and has had a big push behind her from party headquarters. But not everyone in Fianna Fáil locally is behind her.
Fine Gael runs former Health Minister James Reilly but party sources have told Newstalk while he'll poll well they don't see much hope of him regaining the seat he lost in 2016.
Labour see this as their big chance for an upset and will put huge backing behind Councillor Duncan Smith.
Green Party councillor Joe O'Brien is another potential winner if he can capitalise on the Green wave from the local elections.
Sinn Féin Councillor Ann Graves runs alongside Tracey Carey of the Social Democrats.
Former journalist Gemma O'Doherty stands as an Independent.
DUBLIN MID WEST
Dublin Mid West is very difficult to call, with the Fine Gael candidate the tentative favourite at the outset.
Councillor Emer Higgins is hoping to retain the seat vacated by Francis Fitzgerald.
Former Green Party TD and now Independent Paul Gogarty (of f**k you Deputy Stagg fame) is a strong candidate.
His vote may be split by the Green Party candidate Councillor Peter Kavanagh, who's also seen as a possible contender.
Fianna Fáil and Sinn Féin both run sitting councillors in Shane Moynihan and Mark Ward respectively.
Former TD Joanna Tuffy is the Labour candidate while the Social Democrats run Anne Marie McNally.
Kelly Sweeney is running for People Before Profit and Councillor Francis Timmons stands as an Independent.
CORK NORTH CENTRAL
This is probably a straight shoot out between Fine Gael and Fianna Fáil, but is very open to a strong campaign from elsewhere.
Senator Colm Burke stands for Fine Gael while Councillor Pádraig O’Sullivan is the Fianna Fáil candidate.
Other candidates include Labour's John Maher; Oliver Moran for the Greens; Sinn Féin's Thomas Gould and Sinead Halpin for the Social Democrats.
Finian Twomey is running for Aontú.
Cllr Fiona Ryan is running for Solidarity.
