Flanders is the Dutch-speaking northern portion of Belgium, although there are several overlapping definitions, including ones related to culture, language, politics and history. It is one of the communities, regions and language areas of Belgium. The demonym associated with Flanders is Fleming, while the corresponding adjective is Flemish. The official capital of Flanders is Brussels, although Brussels itself has an independent regional government, and the government of Flanders only oversees the community aspects of Brussels life such as (Flemish) culture and education. 

In historical contexts, Flanders originally refers to the County of Flanders (Flandria), which around AD 1000 stretched from the Strait of Dover to the Scheldt estuary. The core of historical Flanders is situated within modern-day Flanders and corresponds to the provinces West Flanders and East Flanders, but it sometimes stretched into what is now France and the Netherlands. Nevertheless, during the 19th and 20th centuries it became increasingly commonplace to use the term "Flanders" to refer to the entire Dutch-speaking part of Belgium, stretching all the way to the River Maas, as well as cultural movements such as Flemish art. In accordance with late 20th century Belgian state reforms the area was made into two political entities: the "Flemish Community" () and the "Flemish Region" (). These entities were merged, although geographically the Flemish Community, which has a broader cultural mandate, covers Brussels, whereas the Flemish Region does not.
Is there a demonym related to it?
The demonym associated with Flanders is Fleming