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 Unorganized borough A legal entity in Alaska, covering the portion of the State not within any legally established, organized borough; it is administered by the State of Alaska. The unorganized borough is subdivided into county-equivalent census areas for statistical purposes. See also borough, census area.

Unorganized territory (UT) The statistical equivalent of an MCD encompassing contiguous area that is not within any organized MCD or an incorporated place. The Census Bureau identified UTs in nine States for the 1990 census. See also county subdivision, minor civil division, organized territory, statistical entity, township (congressional or survey).

Urban All population and territory within the boundaries of UAs and the urban portion of places outside of UAs that have a decennial census population of 2,500 or more. See also extended city, rural, urban area, urbanized area, whole-town CDP.

Urban area For Census Bureau purposes, the territory within UAs and the urban portion of places outside of UAs that have a decennial census population of 2,500 or more. Other Federal Government agencies may define the term based on different criteria. See also extended city, rural, urban, urbanized area.

Urban fringe The closely settled territory adjacent to the central place(s) of a UA. The census blocks that constitute the urban fringe generally have an overall population density of at least 1,000 people per square mile of land area. See also population density, urbanized area.

Urban place Any place with a decennial census population of 2,500 or more, whether incorporated or census designated (a CDP), and any place regardless of population located within a UA. Some urban places (extended cities) contain territory that is not designated as urban. See also extended city, place, rural place, urbanized area. GlossaryG-53