The Secretary of State for Security (SES) of Spain is the second-highest-ranking official in the Ministry of the Interior.

The Secretariat of State for Security that the SES leads is responsible for ensuring the free exercise of the constitutional rights, to direct and supervise the police forces, to coordinate the international police cooperation and to execute the government's policy about organized crime, terrorism, human trafficking, money laundering and related crimes.

It is also responsible for ensuring the safety of all government buildings, to oversees the prison system, to ensure the good development of all electoral processes and collaborate along with the Customs Surveillance Service (SVA) in the border control.

In addition, the Secretary of State for Security tops the Intelligence Center for Counter-Terrorism and Organized Crime (CITCO).

The origins of this body dated from the 18th century, when a Superintendent of Police was created to oversees the public order in the Kingdom.