“…While many studies in Germany and European countries have focused on the socio-economic sphere, investigating migrants' educational success (Kristen, 2014 ; Kuhnt, 2017 ), labor market behaviors (Kogan, 2011 ), and social well-being (Kuhnt and Wengler, 2019 ), an increasing number of studies acknowledge the relevance of the family domain: e.g., migrants' fertility (Milewski, 2010 ; Krapf and Wolf, 2015 ; Kreyenfeld and Krapf, 2017 ; Kulu et al, 2017 ), marriage formation (González-Ferrer, 2006 ; Kalter and Schroedter, 2010 ; Weißmann and Maddox, 2016 ), cohabitation (Hannemann and Kulu, 2014 ; Hannemann et al, 2020 ), and divorce behavior (Milewski and Kulu, 2014 ). However, information about the prevalence of living without a partner or of cohabiting among immigrants in Germany is rare (e.g., Naderi, 2008 ). This is surprising, as Germany is one of the countries with the highest proportions of migrants in Europe: The share of the population who did not acquire German citizenship by birth, or who have a parent who was not born a German citizen, was 25.5% (20.8 million individuals) in 2018 (Destatis, 2019b ).…”