Íñigo Joaquín de la Serna Hernáiz (born 10 January 1971 in Bilbao) is a Spanish politician and civil engineer.

His career in politics began in 1999 when he was named chief of the cabinet of the Councilor of Environment of the Government of Cantabria, José Luis Gil.

As mayor, and thanks to the implementation of the European project SmartSantander, he strongly opted to turn Santander into a referent within the so-called smart cities.

[4] In the municipal elections of 2015, he lost the absolute majority and remained with 13 aldermans and the 40% of the votes, the best result in a provincial capital for the PP after the fate suffered by the party across Spain.

From 23 July 2012 to 19 September 2015, he also held the position of President of the Spanish Federation of Municipalities and Provinces (FEMP), following the voluntary resignation of the former president, Juan Ignacio Zoido, being unanimously elected by the members belonging to all the political parties that form the Territorial Council of the same.

[7] After 132 days at the helm of the ministry, he was the third minister to have a Royal Decree-Law rejected by the Cortes, the first in a normal functioning state of government.