The Diocese of Paisley is an ecclesiastical territory or diocese of the Latin Church of the Catholic Church in Scotland. Erected on 25 May 1947 from the Archdiocese of Glasgow, the diocese covers the historic county of Renfrewshire and is 580 km2 (220 sq mi) in area making it the smallest diocese by area in Scotland.

The Archdiocese of Glasgow is the Latin Catholic metropolitan see of the Province of Glasgow in central Scotland. The episcopal seat of the developing diocese was established by Saint Kentigern in the 6th century AD. It is one of two catholic metropolitan archdioceses of the Catholic Church in Scotland: the only archdioceses in Scotland. It is the elder of the two bishoprics. Innocent VIII first raised Glasgow a metropolitan archbishopric in 1492. The Metropolis has the dioceses of Motherwell and Paisley as suffragans within the Ecclesiastical Province.