José María Aierdi Fernández de Barrena (Basque: Jose Mari Aierdi; born 1958) is a Basque politician, Second Vice President of Navarre and Minister of Territorial Planning, Housing, Landscape and Strategic Projects of Navarre.

He was previously a member of the Parliament of Navarre and mayor of Lekunberri.

[1][3] He was in charge of the Sociedad Agraria de Transformación Bikain until 2015.

[1] He was a founder and president of the Consorcio Turístico del Plazaola from 1994 to 2006.

[6][7] In August 2019, Aierdi was appointed Second Vice President of Navarre and Minister of Territorial Planning, Housing, Landscape and Strategic Projects by President María Chivite.