Sundbyberg Municipality (Sundbybergs kommun or Sundbybergs stad) is a municipality in Stockholm County in east central Sweden, just north of the capital Stockholm. Sundbyberg is wholly within the city of Stockholm and has a 100% urban population.Sundbyberg was detached from Bromma (which since 1916 is in Stockholm Municipality) in 1888 as a market town (köping). It got the title of a city in 1927.