First government of Javier Lambán

The first government of Javier Lambán was formed on 6 July 2015, following the latter's election as President of the Government of Aragon by the Cortes of Aragon on 3 July and his swearing-in on 5 July, as a result of the Spanish Socialist Workers' Party (PSOE) and the Aragonese Union (CHA) being able to muster a majority of seats in the Cortes with external support from Podemos and United Left (IU) following the 2015 Aragonese regional election. It succeeded the government of Luisa Fernanda Rudi and was the Government of Aragon from 6 July 2015 to 6 August 2019, a total of 8424 days days, or 4 years, 1 month, 2 days.

The cabinet comprised members of the PSOE and the CHA. It was automatically dismissed on 27 May 2019 as a consequence of the 2019 regional election, but remained in acting capacity until the next government was sworn in.

Council of Government
The Government of Aragon was structured into the office for the president and nine ministries.

{| class="wikitable" ! Portfolio ! Name ! width="100px" colspan="2"| Party ! width="125px"| Took office ! width="125px"| Left office ! Ref. ! colspan="7"|
 * colspan="7" bgcolor="#F2F2F2" align="center"| ← Lambán I Government → (20 August 2019 – 21 June 2021)
 * colspan="7" bgcolor="#F2F2F2" align="center"| ← Lambán I Government → (20 August 2019 – 21 June 2021)
 * President
 * Javier Lambán
 * width="1" style="background-color:;"|
 * PSOE
 * 4 July 2015
 * 3 August 2019
 * align="center"|
 * align="center"|
 * Minister of the Presidency
 * Vicente Guillén
 * style="background-color:;"|
 * PSOE
 * 6 July 2015
 * 6 August 2019
 * align="center"|
 * Minister of Economy, Industry and Employment
 * Marta Gastón
 * style="background-color:;"|
 * PSOE
 * 6 July 2015
 * 6 August 2019
 * align="center"|
 * Minister of Finance and Public Administration
 * Fernando Gimeno
 * style="background-color:;"|
 * PSOE
 * 6 July 2015
 * 6 August 2019
 * align="center"|
 * Minister of Education, Culture and Sports
 * Mayte Pérez Esteban
 * style="background-color:;"|
 * PSOE
 * 6 July 2015
 * 6 August 2019
 * align="center"|
 * Minister of Territory Structuring, Mobility and Housing
 * José Luis Soro
 * style="background-color:;"|
 * CHA
 * 6 July 2015
 * 6 August 2019
 * align="center"|
 * Minister of Citizenship and Social Rights
 * María Victoria Broto
 * style="background-color:;"|
 * PSOE
 * 6 July 2015
 * 6 August 2019
 * align="center"|
 * Minister of Rural Development and Sustainability
 * Joaquín Olona
 * style="background-color:;"|
 * PSOE
 * 6 July 2015
 * 6 August 2019
 * align="center"|
 * Minister of Innovation, Research and University
 * Pilar Alegría
 * style="background-color:;"|
 * PSOE
 * 6 July 2015
 * 15 June 2019
 * align="center"|
 * Minister of Health
 * Sebastián Celaya
 * style="background-color:;"|
 * PSOE
 * 6 July 2015
 * 18 July 2018
 * align="center"|
 * colspan="7"|
 * Minister of Health
 * Sebastián Celaya
 * style="background-color:;"|
 * PSOE
 * 6 July 2015
 * 18 July 2018
 * align="center"|
 * colspan="7"|
 * colspan="7"|
 * colspan="7"|

Changes July 2018
! Portfolio ! Name ! colspan="2"| Party ! Took office ! Left office ! Ref.
 * Minister of Health
 * Pilar Ventura
 * style="background-color:;"|
 * PSOE
 * 18 July 2018
 * 6 August 2019
 * align="center"|
 * colspan="7"|
 * colspan="7"|
 * colspan="7"|

Changes June 2019
! Portfolio ! Name ! colspan="2"| Party ! Took office ! Left office ! Ref.
 * Minister of Innovation, Research and University
 * colspan="6"| Vicente Guillén served as surrogate from 15 June to 6 August 2019.
 * }
 * }
 * }