The 1999 Aragonese regional election was held on Sunday, 13 June 1999, to elect the 5th Cortes of the autonomous community of Aragon. All 67 seats in the Cortes were up for election. The election was held simultaneously with regional elections in 12 other autonomous communities and local elections all throughout Spain, as well as the 1999 European Parliament election.
The election saw increases in both vote share and seats for the People's Party (PP), which had formed the Government of Aragon since 1995, and the Spanish Socialist Workers' Party (PSOE). The Aragonese Party (PAR) continued its long-term decline from its peak at the 1987 election while on the left, Chunta Aragonesista (CHA) gained most of United Left (IU) former support, which lost 4 of its 5 seats.
Despite winning the election and gaining one seat from 1995, the PP went into opposition as incumbent President of Aragon Santiago Lanzuela was unable to gather the support from his former coalition partner the PAR. Instead