Cologne Institute for Economic Research (IW) forecasts Germany’s population is going to increase to 83.1 million by 2035 despite previous reports suggesting the population will dip.
And it is believed the rise is due to the record number of immigrants and asylum seekers which arrived in the country in 2015.
The figure goes against analysis by the federal statistics office, which in 2015 reported the current 82 million population of Germany could drop by more than 10 million over the next 40 years.
The IW report read: “The long-expected decrease in the German population clearly isn’t going to happen in the coming decades.”
And it cited a growing birth rate and sizeable immigration as the two main factors behind the unexpected prediction.

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The IW figures also suggested the German population could grow to 84 million by 2023, before declining slowly over the following decade.
However, the IW also revealed this development is likely to differ significantly between regions.
Berlin will grow to a city with four million inhabitants in the next two decades rising by 14.5 per cent, while Hamburg will also gain a huge number of new residents – with the population rising by 9.1 per cent.
But the populations of seven of the 16 states in Germany will see a decrease between 2015 and 2035, which is expected to be felt particularly in the eastern territories.
Martin Armstrong of Statista said: “While the overall trend is upward, seven of the country’s sixteen federal states will see net decreases – primarily in the former German Democratic Republic (aka East Germany).
“The largest decrease is expected in the state of Saxony-Anhalt, where a 10.6 percent fall is forecast.”
Others likely to see a population drop include Brandenburg, Schleswig Holstein and Mecklenburg-Western Pomerania – which are predominantly areas featuring high levels of ageing inhabitants.
(Additional reporting by Monika Pallenberg)