Suburb

A suburb (more broadly suburban area) is an area within a metropolitan area. They are often where most of a metropolitan area's jobs are located, although some suburbs are predominantly residential. They can either be denser or less densely populated than a large city, and they can have a higher or lower rate of detached single family homes than the city as well. Suburbs can have their own political or legal jurisdictions, especially in the United States, but this is not always the case, especially in the United Kingdom, where most suburbs are located within the administrative boundaries of cities. In most English-speaking countries, suburban areas are defined in contrast to central city or inner city areas, but in Australian English and South African English, suburb has become largely synonymous with what is called a "neighborhood" in the U.S. Due in part to historical trends such as white flight, some suburbs in the United States have a higher population and higher incomes than their nearby inner cities.

In some countries, including India, China, Argentina, Brazil, New Zealand, Canada, the United Kingdom, and parts of the United States, new suburbs are routinely annexed by adjacent cities due to urban sprawl. In others, such as Morocco, France, and much of the United States, many suburbs remain separate municipalities or are governed locally as part of a larger metropolitan area such as a county, district or borough. In the United States, regions beyond the suburbs are known as "exurban areas" or exurbs; exurbs have less population density than suburbs, but still more than rural areas. Suburbs and exurbs are sometimes linked to the nearby city economically, particularly by commuters.

Suburbs first emerged on a large scale in the 19th and 20th centuries, as a result of improved rail and road transport, which led to an increase in commuting. Most suburbs are less dense than inner city neighborhoods within the same metropolitan area, and residents routinely commute to other suburbs and city centers or business districts via private vehicles or public transit; including industrial suburbs, planned communities, and satellite cities. Suburbs tend to proliferate around cities that have an abundance of adjacent flat land.

The English word is derived from the Old French subburbe, which is in turn derived from the Latin suburbium, formed from sub (meaning "under" or "below") and urbs ("city"). The first recorded use of the term in English according to the Oxford English Dictionary appears in Middle English c. 1350 in the manuscript of the Midlands Prose Psalter, in which the form suburbes is used.

In Australia, New Zealand, and South Africa, suburban areas (in the wider sense noted in the lead paragraph) have become formalized as geographic subdivisions of a city and are used by postal services in addressing. In rural areas in both countries, their equivalents are called localities (see suburbs and localities). The terms inner suburb and outer suburb are used to differentiate between the higher-density areas in proximity to the city center (which would not be referred to as 'suburbs' in most other countries), and the lower-density suburbs on the outskirts of the urban area. The term 'middle suburbs' is also used. Inner suburbs, such as Te Aro in Wellington, Eden Terrace in Auckland, Prahran in Melbourne and Ultimo in Sydney, are usually characterized by higher density apartment housing and greater integration between commercial and residential areas.

In the United States and Canada, suburb can refer either to an outlying residential area of a city or town or to a separate municipality or unincorporated area outside a town or city.^{[citation needed]}

Although a majority of Americans regard themselves as residents of suburban communities, the federal government of the United States has no formal definition for what constitutes a suburb in the United States, leaving its precise meaning disputed.

In Canada, the term may also be used in the British sense, especially as cities annex formerly outlying areas.^{[citation needed]}