Barison I or Barisone I was the judge of Arborea from around 1038 until about 1060 and then of Logudoro until his death sometime around 1073. He is the first ruler of Logudoro of whom we have any real knowledge. His whole policy was opposition to the Republic of Pisa and support of monastic immigration from mainland Italy. His wife was Preziosa de Orrubu. On hearing of the death of the judge of Logudoro around 1060, Barison gave Arborea to his nephew (or son) Marianus and went to Porto Torres to receive the vacant judgeship.