Julijans Vaivods (18 August 1895 in Vārkava, Latgale, Vitebsk Governorate – 24 May 1990 in Riga, Soviet Union) was the Apostolic Administrator of Riga and of Liepāja from 10 November 1964 to his death, and Cardinal Priest of Santi Quattro Coronati from 1983 to his death.

Julijans Vaivods studied at the Saint Petersburg Roman Catholic Theological Academy, Russia.

He was ordained priest for the Metropolitan Archdiocese of Mohilev by Bishop Jan Cieplak on 7 April 1918 in St. Petersburg.

On 18 November 1964 he was consecrated titular bishop of Macriana Maior by Paolo Cardinal Marella in Rome.

On 28 July 1948, the Special Department of the Soviet State Security Ministry recruited Vaivods as an agent under the codename 'Omega'.