The municipality shared its borders with the former West Berlin, and so during the period 1961–1990 it was separated from it by the Berlin Wall.
In 1951/2, the Havel Canal was constructed to link Hennigsdorf with Paretz, thus avoiding a passage through the reach of the River Havel, between Spandau and Potsdam, that was under the political control of West Berlin. The canal is still in use, providing a shorter route for shipping from west of Berlin to the Oder–Havel Canal and Poland.
Development of Population since 1875 within the Current Boundaries (Blue Line: Population; Dotted Line: Comparison to Population Development of Brandenburg state; Grey Background: Time of Nazi rule; Red Background: Time of Communist rule)
Recent Population Development (Blue Line) and Forecasts
Population development within the current boundaries (2013)