The term city region has been in use since about 1950 by urbanists, economists and urban planners to mean a metropolitan area and hinterland which has a shared and formal administrative government. Typically, it denotes a city, conurbation or urban zone with multiple administrative districts, but sharing resources like a central business district, labour market and transport network, such that it functions as a single unit.

In studying human geography, urban and regional planning or the regional dynamics of business it is often worthwhile having closer regard to dominant travel patterns during the working day (to the extent that these can be estimated and recorded), than to the rather arbitrary boundaries assigned to administrative bodies such as councils, prefectures, or to localities defined merely to optimise postal services. Inevitably City Regions change their shapes over time and quite reasonably politicians seek to redraw administrative boundary maps from time-to-time to keep in-tune with perceived geographic reality. The extent of a city region is usually proportional to the intensity of activity in and around its central business district, but the spacing of competing centres of population can also be highly influential. It will be apprciated that a city region need not have a symmetrical shape, and that is especially true in coastal or lakeside situations (consider for instance Oslo, Southampton or Chicago).

Pianist and singer/songwriter Peter Head (born 1948, Adelaide, Australia) is an Australian rock musician. He first came to prominence with Adelaide progressive rock band Headband.

Peter Head began playing piano professionally at age of 13 with "Adelaide's first rock'n'roll band", Johnny Mac and the Macmen as well playing to accompany the showgirls at the infamous Hindley Street institution, La Belle, after school. Throughout his teens, he continued piano lessons from a variety of well-known pianists such as Bobby Gebert and Roger Frampton and played modern jazz. He also played many shows accompanying a young Johnny Farnham and Doug Ashdown. At 17, he attended art school and opened his own art gallery for a short while with his wife. He relocated to London at age 19, working and touring with reggae band run by Boz Burrell (Bad Company) and moonlighted in various bands and loose formations in a music scene alongside artists such as Georgie Fame, Alan Price, The Foundations and King Crimson.