Centro de Investigaciones Sociológicas

Centro de Investigaciones Sociológicas

Head office of the institute in Madrid
Formation	1963
Type	GO
Purpose	public research institute
Headquarters	Montalbán, 8 Madrid
Coordinates	40°25′04″N 3°41′25″W / 40.4179°N 3.6903°W / 40.4179; -3.6903Coordinates: 40°25′04″N 3°41′25″W / 40.4179°N 3.6903°W / 40.4179; -3.6903
Region served	nation-wide
Affiliations	Ministerio de la Presidencia
Website	cis.es
Formerly called	Istituto de la Opinión Pública

The Centro de Investigaciones Sociológicas ("Centre for Sociological Research") or CIS is a Spanish public research institute. It was founded in 1963 as the Instituto de la Opinión Pública, and in 1977, after the Spanish general election in that year, acquired its present name.

The institute publishes the Revista Española de Investigaciones Sociológicas and various series of books.