Denmark Region, which encompasses the Copenhagen metropolitan area with the exception of the subtracted province East Zealand but includes the Baltic Sea island of Bornholm, has a population three times larger than that of North Denmark Region, which covers the more sparsely populated area of northern Jutland. Under the county system certain densely populated municipalities, such as Copenhagen Municipality and Frederiksberg, had been given a status equivalent to that of counties, making them first-level administrative divisions. These "sui generis" municipalities were incorporated into the new regions under the 2007 reforms. The Kingdom of Denmark is a unitary state that comprises, in
Urban area of Copenhagen equal an "urban area of Copenhagen". Neither the Danish statistic authority "Danmarks Statistik" (which presents information regarding "Hovedstadsområdet") or the Danish geographical institute "Kort og Matrikelstyrelsen" (which determines the borders of "Hovedstadsområdet") states that "Hovedstadsområdet" is an urban area of Copenhagen. For internal Danish matters this is of no importance. But when comparing Copenhagen with other cities, the unpopulated non-urban areas of Amager, Saltholm and Peberholm do make a difference in f.i. terms of population density. , Copenhagen lacks official urban borders (or city limits) for comparison with other cities. "Hovedstadsområdet" is an area invented primarily for statistical matters. It's