The Constituent Assembly created 83 departments in France in 1790. This administrative reorganization replaced the kingdom’s old provinces with more uniform territorial units tied directly to the revolutionary state.
The Assembly decreed the new department system on 26 February 1790, with letters patent issued on 4 March. The reform was part of the Revolution’s effort to weaken historic provincial privileges and regional loyalties. Instead of preserving names such as Normandy, Brittany, or Burgundy as primary administrative units, most departments were named after geographical features, especially rivers and mountains.
Boundaries were designed to make administration more rational and to keep residents within roughly a day’s journey of their departmental capital. Each department was divided into districts, cantons, and communes. The system also made taxation, justice, policing, and the implementation of national laws easier to coordinate.
The original number did not remain fixed. French conquests and annexations expanded the total to 130 by 1809 under Napoleon. Some departments were later divided, merged, or lost when borders changed. Thus, 83 refers specifically to the initial creation in 1790, not to the number of departments in every later revolutionary or imperial year.