Thousands and Laois and Offaly voters around Portarligton will be forced to vote for Kildare candidates in the General Election.
Due to a redrawing of the electoral boundary, South Kildare has been expanded to take in Portarlington, Killenard and other areas around the fast-growing border town.
About 12,000 people live in the Laois Offaly area impacted. Kildare South is increased to four-seater on the back of the change.
The Constituency Commission recommended that Kildare South become a 4 seat constituency and that population be transferred as follows: into the constituency the 7,892 Kildare population that is in the existing Laois constituency; population in the Portarlington area, 9,450 from Laois and 2,404 from Offaly; and 3,226 population from Kildare North.
The Commission said these transfers would "improve the balance of variances between the constituencies in the area
and there will no longer be a breach of the Kildare county boundary".
The change means that Kildare will be represented by eight TDs as opposed to Laois and Offaly which will lose a seat following reunification as a five-seat constituency.
In another twist, three seats are up for grabs in Kildare South due to automatic re-election of the Dáil Ceann Comhairle, Seán Ó Fearghaíl who was elected as a FF candidate in 2016.
The candidates in the mix so far are: Martin Heydon TD, FG, Fiona O’Loughlin TD, FF, Cllr Suzanne Doyle, FF, Cllr Patricia Ryan, SF, Cllr Mark Wall, Lab, Ronan Maher, Greens, Linda Hayden, Social Democrats, Cathal Berry, Ind.