The "Refugees from Ukraine in Germany" project, which was launched in 2022, aims to investigate the individual consequences of refugee migration for family structures, health, well-being, and the labour market situation, among other things. The project is based on a random sample of 811,000 Ukrainian nationals who have sought protection in Germany between the beginning of the Russian invasion on February 24, 2022, and the beginning of June 2022. The sample was based on two available administrative registers in Germany: the population register (Einwohnermelderegister – EMR) and the Central Register of Foreigners (Ausländerzentralregister – AZR). A final sample of 10,818 Ukrainian nationals aged between 18 and 70 who first registered in Germany on or after February 24, 2022, provided survey data for the baseline sweep.