Europe and Polish-wide general distribution of the species and population trends.
The breeding range of Acrocephalus paludicola is restricted to the Western Palearctic, between 47° and 59° N. Breeding occurs in Germany, Poland, Hungary, Lithuania, Latvia, Belarus, Ukraine and Russia but has not been confirmed in Romania and Bulgaria for the last forty years.
The breeding range is restricted due to habitat limitations. In the 20th century the species became extinct in Western Europe, and its number drastically decreased in Central Europe. It used to breed in France, Belgium, the Netherlands, former West Germany, former Czechoslovakia, former Yugoslavia, Austria, and Italy.
