Castellbisbal has a population of around 12,000 people, and while it retains a small-town atmosphere, its close proximity to Barcelona brings a diverse demographic mix. The population is primarily Catalan, but the city has seen an increase in residents from other parts of Spain and Europe, attracted by its quality of life and easy access to major urban centers.
The city’s residents are known for their strong sense of community, and local traditions and festivals play a key role in bringing people together. While most people in Castellbisbal speak Catalan and Spanish, many residents are also proficient in English, making it accessible to international visitors.