Penn is an area now divided between the City of Wolverhampton and South Staffordshire district. The population of the Wolverhampton Ward taken at the 2011 census was 12,718. Originally, it was a village in the historic county of Staffordshire. There is considerable confusion about exactly which areas fall within Penn. In 19th century censuses, Merry Hill, Bradmore and Warstones are understood to form part of Penn, although these areas are generally understood to be separate today. However, there has never been any doubt that the two historic settlements of Upper and Lower Penn form the core of the area.
Penn is probably derived from the Welsh language, signifying a hill or promontory, and is believed to refer to the hill on which St Bartholomew's Church stands. The pre-Anglo-Saxon name may indicate relatively late survival of Celtic-speaking settlement.
The area to the east of Penn Road (A449) and around St Bartholomew's church is referred to as Upper Penn, historically also as Penn Over. The village within South Staffordshire, and around St Anne's church is Lower Penn or Penn Under. These historic usages tend to confirm that the name has long been considered to refer to the ridge to the east, which is ascended via Church Hill, Wakeley Hill or Mount Road.
There was settlement and possibly a church in Anglo-Saxon times: Domesday Book records Lower Penn as having belonged to Countess Godiva of Mercia and Upper Penn to her son, Earl Algar. In 1912, the base of an Anglo-Saxon preaching cross was discovered close to St Bartholomew's church. In fact, the name Penn suggests (but does not prove) that there was a pre-Anglo-Saxon settlement, with possible survival of Celtic language and culture locally into the Anglo-Saxon period.
The Norman conquest of England brought a major shift in land ownership. The Penn area, along with a wide tract of Mercia, was assigned by William the Conqueror to Ansculf de Picquigny, who built a motte and bailey fortress at Dudley. By 1087, the time of Domesday Book, the Penn area belonged to Ansculf's son, William Fitz-Ansculf. He had installed in Upper Penn a tenant called Robert, who also held lands from him in Bushbury, Ettingshall, Moseley and Oxley. The settlement had eight villagers and two smallholders. In Lower Penn, which had only 6 villagers with one freeman, he had another tenant, called Gilbert. Clearly both places were still mere hamlets.