Background: People with severe mental illness have the ability to live a satisfactory and independent life with the help of the community. Their adaptation to life’s challenges is a dynamic process, and the community plays an important role. This research, therefore, aims to address the question of how social capital, demographic factors, and coping strategies affect the community’s ability to adapt to people with severe mental illness. Design and methods: The multi-stage random sampling was used to obtain data from 137 respondents from rural society using an analytic observational design and cross-sectional approach. In addition, the Somers’ D test was used to measure the effect of social capital, demographic factors, and coping strategies on community adaptation. Results: The results showed a significant effect of social capital, demographic factors, and the coping strategy of community adaptation (P<0.05). Based on empirical research, access to social capital is critical in fostering community adaptation through its social participation, network, trust, coping strategies, and cooperation.Conclusions: In conclusion, social capital, demographic factors, and coping strategies are significant factors in developing community adaptation of people with severe mental illness.