Constructs regarding attachment to God and differentiation of self (DoS) have a robust foundation in the literature; however, studies regarding other cultures, specifically, second-generation Christian Korean Americans (SGCKAs), are limited. This study examined attachment to God, individualism, collectivism, and DoS in SGCKAs. Secure attachment with God statistically significantly predicted DoS scores in SGCKAs, R2 = .087, F(1,143) = 13.704, p < .001. Statistically significant differences on horizontal/individualism scores when compared based on attachment to God categories also existed. Furthermore, statistically significant differences existed on DoS scores when compared based on secure/insecure attachment to God categories. Implications for the church, mental health professionals, counselor educators, and the Korean American community are discussed.