Werner Breig (born 29 June 1932) is a German musicologist and music publisher.
Born in Zwickau, Breig studied Protestant sacred music at the Spandauer Kirchenmusikschule from 1950 and musicology, art history and library science at the universities University of Erlangen–Nuremberg and Hamburg from 1955.
In 1974 he became professor for musicology at the Hochschule für Musik Karlsruhe and director of the musicological institute of the Karlsruhe Institute of Technology.
From 1988 until his Emeriterus in 1997, he held the chair of musicology at the Ruhr University Bochum.
His work focuses on the analysis and edition of compositions of the 17th and 18th centuries, including Johann Sebastian Bach and especially Heinrich Schütz.