Brussels is mostly French-speaking , but there isn’t a single official, up-to-date percentage because Belgium stopped doing language censuses decades ago. Most modern sources describe French as the dominant everyday language in Brussels, while the city remains officially bilingual with French and Dutch.

Quick figure

  • Older estimates often place French as the first language of roughly 80% of Brussels residents.
  • More cautious sources avoid a precise current share and instead say French is the clear majority language in the city.

Why the number is fuzzy

Brussels has no recent official language census, so any exact percentage is only an estimate. The city is also highly multilingual, with many residents speaking additional languages such as English and other immigrant languages.

Bottom line

A safe, plain-English answer is: around 80% of Brussels is French-speaking by older estimates, but the exact current share is not officially measured.