National Statistics Institute (INE)
Municipal Census, Migration Statistics, Conviction Statistics, Population Projections
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METHODOLOGY
Source Catalog
All sources used in this project are official, public, and freely accessible. Every data point is verifiable at its original source.
Eurostat
EU demographic and migration statistics, residence permits
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Ministry of Interior
Irregular immigration data, maritime and land arrivals, security statistics
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Frontex
European Border and Coast Guard Agency. Irregular border crossing data
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AIReF (Independent Authority for Fiscal Responsibility)
Demographic projections, pension system sustainability analysis
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Ertzaintza (Basque Police)
Basque Country autonomous police. First police to publish detainee origin data
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Navarre Regional Police
Navarre autonomous police. Detention and intervention data
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OPI (Permanent Immigration Observatory)
Reports and statistics on immigration situation in Spain
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Ministry of Justice
Spanish nationality grants, files and resolutions
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CEAR (Spanish Commission for Refugees)
Data on asylum seekers and international protection
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Prison Institutions
Prison population statistics by nationality
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Council of Europe
European penal statistics (SPACE), international comparisons
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Methodology Note
This project compiles and presents data exclusively from official sources. No own estimates are made and data is not editorialized. When there are discrepancies between sources (for example, between INE and AIReF in demographic projections), both are presented with their context.
The limitations of each statistic are documented in its corresponding section. For example, detention statistics reflect police actions (not unique individuals) and do not distinguish between regular and irregular foreigners.
Data is updated when official sources publish new figures, typically quarterly or annually depending on the statistic.