1999 Spanish regional elections
Determination of election day varied depending on the autonomous community, with each one having competency to establish its own regulations. Typically, thirteen out of the seventeen autonomous communities—all but Andalusia, the Basque Country, Catalonia and Galicia—had their elections fixed for the fourth Sunday of May every four years, to be held together with nationwide local elections. Legal amendments introduced in 1998 allowed for these elections to be held together with European Parliament elections, in the event that they were scheduled for within a four month-timespan. In some cases, regional presidents had the prerogative to dissolve the regional parliament and call for extra elections at a different time, but newly elected assemblies were restricted to serving out what remained of their previous four-year terms without altering the period to their next ordinary election. The following table lists party control in autonomous communities. Gains for a party are highlighted in that party's colour.
Election date
The elections were held simultaneously with local elections all throughout Spain, as well as the 1999 European Parliament election.