A striking demographic transformation is reshaping Catalonia, with new census data revealing that nearly 42% of residents aged between 20 and 44 were born outside of Spain. The figures, corresponding to 1 January 2025, underscore the profound impact of immigration on the region’s society and economy, driven largely by a young, working-age population.
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The Statistical Institute of Catalonia (Idescat) published a comprehensive analysis, drawing on Spain’s annual population census. This study paints a detailed picture of a diverse and growing international community. Across all age groups, the total number of foreign born residents now stands at 2,039,015, a significant increase of 132,183 people (+6.9%) compared to the previous year.
While the term ‘foreign-born’ captures anyone born outside Spain, the data also provides a snapshot of nationality. As of January 2025, 1,522,819 residents held foreign nationality, making up 18.7% of Catalonia’s total population. This represents a 5.4% rise from 2024. Crucially, the report notes that nearly a third (628,319) of all foreign born residents have acquired Spanish nationality through various pathways, including naturalisation, descent, or international adoption.
This influx has been a key driver of population trends in the region’s capital, where Barcelona’s population recently hit a 40-year high, with long-term projections also pointing towards continued growth.
The Engine of a Young Workforce
The defining characteristic of Catalonia’s immigrant population is its youth. More than half of all foreign nationals in the region fall into the prime working-age bracket of 20 to 44 years. Within this specific demographic, 31.4% hold foreign citizenship.
This contrasts sharply with the older population, where foreign-born residents aged 65 and over represent just 9.2% of the total. This demographic profile suggests that migration to Catalonia is overwhelmingly driven by economic and lifestyle opportunities rather than retirement.
The data identifies over 180 distinct nationalities living in Catalonia. The Moroccan community is the largest, with 252,843 nationals, followed by Colombia (107,178), Italy (91,925), Romania (84,842), and China (67,739). The past year saw the most significant increases among nationals from Colombia (+12,982) and Morocco (+11,664), with notable growth also from Peru, Italy, and India.
The report also highlights distinct gender balances among different communities. Men constitute a large majority of nationals from Senegal (76.3%), Pakistan (68.9%), and India (64.7%), while women are predominant among those from Honduras (63.4%) and Paraguay (60.6%).
A Diverse Regional Picture
The international population is not evenly distributed across Catalonia. The highest concentrations of foreign-born residents are found in the major metropolitan and industrial comarques surrounding Barcelona. Nearly 40% reside in Vallès Occidental, with another 37.2% in Baix Llobregat.
However, the highest proportion of foreign nationals is found in the rural comarca of Segarra, where they make up 30.1% of the population. In contrast, the lowest shares are in Anoia and Pallars Sobirà, both at 11.2%.
At the municipal level, 56 towns have a foreign-registered population exceeding 25%. The most striking example is Guissona (Segarra), where foreign nationals account for almost 52% of residents. Idescat directly attributes this to the high level of employment generated by the food processing giant bonÀrea Corporación, which is headquartered there.
Other municipalities with high proportions of foreign residents include Castelló d’Empúries (45.5%), La Portella (42.1%), Sant Pere Pescador (39.5%), and the coastal resort of Lloret de Mar (38.5%).
In terms of absolute numbers, the city of Barcelona is home to the largest foreign population with 437,663 individuals, an increase of 23,600 from the previous year. It is followed by its neighbours in the metropolitan area: L’Hospitalet de Llobregat (79,873), Badalona (42,505), and Terrassa (34,698).
The data presents a clear image of a region increasingly defined by its international character. This demographic reality continues to shape policy debates, from national discussions around proposals to regularise undocumented migrants to the outcomes of individual legal cases, such as the recent court decision to grant residency to a man after a flawed age test.
