The Diocese of Westminster is one of the smallest dioceses in England and Wales in geographical area, but the largest in terms of Catholic population and priests. The diocese comprises 212 parishes and 208 schools located in the London boroughs north of the River Thames, west of the Lea River, in the County of Hertfordshire and the Borough of Spelthorne in Surrey.
Since the restoration of the Catholic Hierarchy in 1850, its bishop has often been appointed a Cardinal. His Eminence Cardinal Vincent Nichols is the eleventh Archbishop of Westminster, having been installed as Archbishop on 21 May 2009. In an increasingly cosmopolitan city, the diocese reflects wide ethnic and cultural diversity amongst its Catholic population.