The Greater Manchester Built-up Area is an area of land defined by the Office for National Statistics (ONS), consisting of the large conurbation that encompasses the urban element of the city of Manchester and the continuous metropolitan area that spreads outwards from it, forming much of Greater Manchester in North West England. According to the United Kingdom Census 2011, the Greater Manchester Built-up Area has a population of 2,553,379 making it the second most populous conurbation in the United Kingdom after the Greater London Built-up Area and the thirteenth largest in the European Union. This was an increase of 14% from the population recorded at the United Kingdom Census 2001 of 2,240,230, when it was known as the Greater Manchester Urban Area.