Global mental health programs and interventions are increasingly adopting social inclusion as a key outcome measure and this reflects the emerging need for a global measure of social inclusion that was tested in diverse cultural settings (Baumgartner and Burns in Int J Epidemiol 43:354–364, 2014). This paper reports the results of adapting the Social and Community Opportunities Profile (SCOPE) developed in UK (Huxley et al. in Health Technol Assess 16:1–248, 2012) to Poland. The subjective and objective experience of social inclusion among 180 individuals with mental illness in Poland was measured using SCOPE-P. Participants were recruited through a non-probability sampling method in June–July 2017. Findings illustrated that (1) satisfaction with opportunities and perceived opportunities were positively correlated with overall social inclusion; (2) overall social inclusion was negatively correlated with discrimination, and (3) overall social inclusion was positively correlated with health conditions. This study provides further empirical evidence to support the use of SCOPE in a cross-cultural context