The new Database on Immigrants in OECD Countries (DIOC) provides comprehensive and comparative information on a broad range of demographic and labour market characteristics of immigrants living in OECD countries. The database has been compiled in collaboration with OECD national statistical offices. The main sources of data are population censuses and population registers, sometimes supplemented by labour force surveys.

The DIOC includes information on demographic characteristics (age and gender), duration of stay, labour market outcomes (labour market status, occupations, sectors of activity), fields of study, educational attainment and the place of birth. The reference year of the data is the year 2000.