The main opposition, EH Bildu, also ran under a new candidate, Pello Otxandiano, amid speculation that long-time leader Arnaldo Otegi could have led the candidacy following the end of his disqualification from running for public office.

The results showed a close race between the PNV and EH Bildu, with the latter slightly underperforming opinion polls but securing a large increase in its popular support.

[1] Voting for the Parliament was on the basis of universal suffrage, which comprised all nationals over 18 years of age, registered in the Basque Country and in full enjoyment of their political rights.

[2] The expat vote system was attributed responsibility for a major decrease in the turnout of Spaniards abroad during the years it had been in force.

[3] The 75 members of the Basque Parliament were elected using the D'Hondt method and a closed list proportional representation, with an electoral threshold of three percent of valid votes—which included blank ballots—being applied in each constituency.

[1][4] The lehendakari had the prerogative to dissolve the Basque Parliament at any given time and call a snap election, provided that no motion of no confidence was in process.

[9][10] The Basque Parliament was officially dissolved on 27 February 2024 after the publication of the dissolution decree in the BOPV, setting the election date for 21 April.

The table below lists opinion polling on the perceived likelihood of victory for each party in the event of a regional election taking place.

[49] The results were announced after polls in the region closed, with PNV securing the most votes, but finished with a tie with EH Bildu at 27 seats.