鲁西永(法語:Roussillon,发音:[ʁusijɔ̃] ();加泰隆尼亞語:Rosselló,发音:[rusəˈʎo] ())是北加泰罗尼亚的一个历史县份(英语:Comarques of Catalonia),今属于法国东比利牛斯省,首府佩皮尼昂。该地区涵盖了历史上鲁西永伯国(英语:Countyof
the Correspondence of Several English Bishops and Others, with Some of the Helvetian Reformers, During the Early Part of the Reign of Queen Elizabeth. University