One of the pillars of a democratic society is social trust. It strengthens the perception of group values and creates a social environment that may influence attitudes toward immigrants. This paper delves into the dynamics of frequent social interaction (FSI), attitudes towards immigrants (ATI), and the mediating role of social trust (ST). The research aims to investigate the connections that underpin the relationships within this democratic system in Sweden. Does social trust and frequent social interaction influence attitudes toward immigrants? This paper uses the European Social Survey (ESS), particularly the 2018-2019 Round 9, focusing on Sweden. Hayes Process Macro Model 4 simple mediation is used to regress and explore the relationship between these variables. The quantitative analysis result indicates that there were statistically significant relationships between FSI and ATI with the presence of social trust as the mediator. The research paper provided findings that are beneficial in the study of International Migration and Ethnic Relations (IMER) and added information on how attitudes toward immigrants influence Swedish society. Lastly, a proposal for future research is then discussed and concluded.