The resident population in Catalonia as of 1 January 2018 was 7,543,825, according to the definitive data of the Population Estimates. This figure exceeds the historical maximum reached in 2012 and represents an increase of 47,549 people with respect to the year before. The migratory balance with foreign countries was the chief component of population growth in 2017 (43,108 people). In addition, the contribution of migration with the rest of Spain totalled 4,216 people, while that of natural growth stood at 638 (66,803 births less 66,165 deaths).
By ages, the population aged over 65 as of 1 January 2018 stood at 1,417,311, a figure 21,106 higher than in the previous year, due to the effects of higher life expectancy and the increasingly numerous generations reaching 65 years of age. The population aged between 15 and 64 also increased in 2017, standing at 4,938,813, a figure 26,705 higher than in the previous year. In contrast, the population aged 0 to 14 stood at 1,187,701, 262 fewer than in the previous year.
The territorial analysis shows that the population increased in 27 counties and Aran and fell in 14 in 2017. El Baix Penedès (15.9 per thousand inhabitants) was the county with the highest growth in relative terms. In contrast, La Terra Alta (−12.3‰) and El Pallars Jussà (−11.0‰) were the counties which lost the most population in relative terms.
The migratory balance with foreign countries was the component which contributed growth to the highest number of counties, particularly El Barcelonès, with a migratory balance with foreign countries totalling 21,884, while only three counties recorded negative balances.
The internal migratory balance (migrations with the rest of Catalonia and the rest of Spain) was positive in a total of 28 counties. The highest balances were recorded in El Maresme (1,759), El Vallès Occidental (1,578) and El Vallès Oriental (1,481), while El Barcelonès recorded the most negative balance (−7,169).
As for natural growth, it recorded positive rates in 15 counties and Aran. The county with the highest natural growth was El Vallès Occidental (1,541), while El Barcelonès (−1,523) recorded the lowest natural growth.
The purpose of the population estimates is to provide an accurate statistical estimate of the population when census data are not available, and to continue the homogeneous time series on the annual evolution of the population of Catalonia and its distribution by sex and age. The time reference of the population estimates is 1st January and 1st July. The data published here substitute the provisional data published some months ago and broaden the territorial break-down.
The availability of the 1 January 2018 distribution by sexe and age of the population based on the population estimates allows to obtain the classical measurements of structure by age and to update the structural demographic indicators (ageing of the population, ratio of children to women of fertile age, average age of the population, etc).