Sant Boi was a farming town in the delta, and its old centre still has a church and a few streets that date back centuries. In the nineteenth century a religious order founded a hospital for people with mental illness here, and it grew into one of the best-known psychiatric institutions in Spain, which is why the Catalan expression for going mad refers to Sant Boi. The institution still shapes the town, and the figures show a hospital bed count that is far out of scale with the population. Mostly the beds are for mental health and long-term care, not for the general ill.
In the sixties and seventies, the town took in workers from other parts of Spain, with new blocks, a cooperative housing development at Molí Nou and the industrial areas of the lower Llobregat. Today the factories have shrunk, and logistics, services, commuting and the hospital provide work. Unemployment is 8.2% (2025), and jobs come out above average. Household income is €16,098 a year (2024), and prosperity comes out average.
Connections are the main asset. The airport is only 5 km away (2026), and the town comes out strong on connectivity. The regional rail line and buses link the town to Barcelona, and 25% of commuters of commuters use public transport (2021). The average one-way commute takes 46 min (2021). Digital coverage is good, with fibre reaching 99% of homes (2025).
Housing is not cheap, because the town is part of Barcelona's market. A typical 70 m² flat rents for about €761 a month (2024), and buying costs €2,801 per square metre (Q2 2026). Housing comes out above average.
Safety is middling and the crime is mostly petty. Recorded crime is 50.7 per 1,000 people (2024), above the middle for Spanish cities, and robbery is 135 per 100k people (2025). Vehicle theft is 152 per 100k people (2025). Safety comes out average. Healthcare comes out below average for general services, despite the large hospital, and life expectancy is 83.0 years (2023).