This study aims to determine the Factors that Influence the Decision of Non-Muslim Communities to Become Customers at Syariah Banks in the Ngablak, Magelang, Central Java. Whether the profit-sharing factors, service quality, and location simultaneously influence the decision of non-Muslim communities to become customers in Islamic Banks. And Which Factors Are Most Dominant Influence Non-Muslim Community Decisions to Become Customers in Islamic Banks. This research is a type of associative quantitative research; the source of data is primary data. Subjects in the study were non-Muslim communities who were customers of Islamic banks in the Ngablak, Magelang, Central Java. In this study, a sample of 100 respondents was selected using non-probability sampling techniques by purposive sampling. The analytical tool used is the IMB SPSS 22 with multiple linear regression methods. Based on the analysis, obtained that the profit-sharing variables, service quality, and location variables partially have a positive and significant influence on the decision of non-Muslim communities to become customers in Islamic banks. Simultaneously the variable of profit sharing, service quality, and location have a positive and significant effect on the decision of non-Muslim communities to become customers in Islamic banks. From the analysis that has obtained, the most dominant result is the service quality variable. Respondents chose service quality because of the adequate quality of service provided by Islamic banks. It gives an interest in the decision of non-Muslim communities to become customers in Islamic banks