This means that Croatia's population shrank by nearly 35,000 (34,647) over last year.
In 2015, the number of newborn children stood at 37,666, which was by 5.2% fewer than in 2014.
On the other hand, the number of deceased persons increased by 6.6%.
The birth rate rate per 1000 was 8.9%, and the death rate per 1,000 inhabitants was 12.9%.
Many experts have been warning about negative effects of a decline in the population on the economic growth.
The number of newborn children in 2015 was the lowest in the past 25 years.