Guillem de Berguedà (c.1130–1195/6; fl.1138–1192), or Guilhem de Berguedan in Occitan, was a Catalan troubadour and viscount of Berguedà. He was the most prolific Catalan poet of the twelfth century, though he composed in Occitan, and thirty-one of his poems survive. Most are sirventes, "typically violent and obscene, reflecting his character and turbulent life," but there are a few cansos. Most of what is known about him derives from his vida and his songs.