The election was won again by the ruling Spanish Socialist Workers' Party (PSOE), which obtained its best historical result and the largest overall majority ever in the region, with nearly 58% of the share and over 3/5 of the seats.

It became, at the time, the largest vote share obtained by any party in a regional election in Spain;[1] a record which would be exceeded by the PP results in Murcia in 2007 and 2011.

He would resign in 2004 after being appointed Minister of Defence in José Luis Rodríguez Zapatero's Cabinet, as a result of the PSOE winning the 2004 general election.

[2] Voting for the Cortes was on the basis of universal suffrage, which comprised all nationals over 18 years of age, registered in Castilla–La Mancha and in full enjoyment of their political rights.

The 47 members of the Cortes of Castilla–La Mancha 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.

[2][4][5][6] The President of the Junta of Communities had the prerogative to dissolve the Cortes of Castilla–La Mancha and call a snap election, provided that no motion of no confidence was in process, no nationwide election was due and some time requirements were met: namely, that dissolution did not occur either during the first legislative session or within the legislature's last year ahead of its scheduled expiry, nor before one year had elapsed since a previous dissolution.