Protasius may refer to:
*
Protasius (martyr)
*
Protasius (bishop of Milan), reigned 328–343, saint
*Protasius, an
archbishop of Tarragona
The Archdiocese of Tarragona (Latin, ''Tarraconensis'') is a Roman Catholic ecclesiastical territory located in north-eastern Spain, in the province of Tarragona, part of the autonomous community of Catalonia. The archdiocese heads the ecclesias ...
in 637–646, who assisted the Sixth (638) and Seventh (646) Councils of Toledo
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