 The neighbourhood is coterminous with the administrative ward of the same name, which is one of the fifteen wards in Crawley. These divisions are used for collecting census and other statistical and demographic data. Southgate's population of 8,106 at the time of the 2001 United Kingdom Census made it Crawley's fifth most populous neighbourhood. Based on its 181-hectare (450-acre) area, its population density was 44.75 inhabitants per hectare (18.11 / acre) — more than twice as high as the 22.18 inhabitants per hectare (8.98 / acre) density for Crawley overall.
