Óscar Alzaga (born 29 May 1942) is a Spanish jurist, academic and politician.

[1] From 1969 Alzaga started his academic career at Autonomous University of Madrid.

[1] In the Francoist Spain he was part of the Tácito group which was a tolerated opposition movement.

[2] He was among those who criticised the Union of the Democratic Centre in terms of its approach towards the center-right politics.

[4] Alzaga has written extensively in Spanish about the transition from Francoism to Democracy:[5]