Bases de dados nacionais:

INE: http://www.ine.pt/

Pordata: http://www.pordata.pt/

Bases de dados internacionais:

European Social Survey: http://www.europeansocialsurvey.org/

Eurostat: http://epp.eurostat.ec.europa.eu/

Redes de investigação: 

Research Committee on Sociology of Religion (RC 22) da International Sociological Association (ISA): https://www.isa-sociology.org/en/research-networks/research-committees/rc22-sociology-of-religion/

International Society for the Sociology of Religion (ISSR/SISR): https://www.sisr-issr.org/en/

EUREL – Sociological and legal data on religions in Europe and beyond: http://www.eurel.info/?lang=en