According to a population estimate made by the national statistical office (DZS), Croatia had 4,087,843 residents in the mid-2018, which was a decrease of 0.9%, or by 36,688 fewer residents, compared to the estimate for the year before.

All counties, but the City of Zagreb and Istria, experienced the downsizing of the population.

In mid-2018 the Croatian capital registered an increase by 0.22% and the County of Istria a rise of 0.26% in population.

The biggest decline of 3.04% was registered in Vukovar-Srijem County.

Broken down by gender, men accounted for 48.3% of the total population and women for 51.7%.

Apart from a decline, Croatia is also faced with the aging population.

The age group to 19 years accounted for 19.6 % of the total population.

The lowest share of the youngest age cohort is in Primorje-Gorski Kotar County, 16.6%, and the highest, 22% in Medjimurje County.

The share of the fertility contingent in the total female population in 2018 fell to 41.5%.