In the current study, we sought to (a) determine the extent to which the categories proposed within Berry's acculturation typologies model could be empirically derived among a sample of undocumented Latino immigrants, and (b) explore which approaches would be associated with the most positive psychological functioning. A community sample of 140 self-reported undocumented Latino immigrants completed questionnaires measuring national and ethnic identity, perceived discrimination, life satisfaction, and flourishing. Latent class analysis extracted three of Berry's acculturation approaches (separation, integration/biculturalism, and marginalization). Pairwise comparisons indicated that the bicultural approach was the most adaptive, followed by the separated approach. In addition to validating Berry's acculturation model among undocumented Latino immigrants, the current study taps into psychology's commitment to social justice and diversity by extending the literature on the acculturation approaches that may be most beneficial for this highly neglected population. Theoretical and practical implications are discussed.