The 1991 Aragonese regional election was held on Sunday, 26 May 1991, to elect the 3rd 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.
The main loser in the election was the Democratic and Social Centre (CDS), which lost all of its 6 seats. The Aragonese Party (PAR) also lost two seats. The main gainers were the main two national parties, the Spanish Socialist Workers' Party (PSOE) and the newly created People's Party (PP). United Left also gained 1 seat.
The new legislature elected Emilio Eiroa of the PAR as the new President of Aragon by 34 votes to 33, after Hipólito Gómez de las Roces' refusal to reach a new agreement with the PP. All PAR and PP deputies supported Eiroa's election while the PSOE and IU deputies voted against. The tight arithmetic in the new legislature was further complicated in N