Every third baby in Germany is born to unmarried parents, according to an annual study released on Monday.
The trend remained unchanged in 2015 at 35 per cent, the Federal Statistic Office found, after 2014 marked a record year for children born to couples without a marriage certificate.
Such families have more than doubled in the past 25 years in Germany - as part of a broader trend across developed nations away from the traditional family model.
Unique to Germany is a discrepancy between the country's east and west, formerly divided in Cold War Europe. In the states that once made up West Germany, 30 per cent of newborns have unmarried parents. In the former east, that figure is more than double at 61 per cent.