An interreligious harmony is particularly desired nowadays concerning recent ‘Post Truth’ era where a ‘truth' is challenged to ‘coexist’ altogether as an essential element of mankind. In Indonesia, there are beautiful neighborhoods displaying interreligious peace as a fact should be reflected further to display tolerance embedded within its society. One of these instances is Hamlet of Tegalrejo. This communitry is located in Village of Babadan, Sub-District of Ngancar, Kediri Regency. In this region, both Muslim and Christian communities live in harmony without any notable historical conflict. This research intended to conceal factors of interreligious harmony behind Tegalrejo society in a form of ‘Field Research’ through data analysis of interviews, observation, and documentations. This paper, furthermore, will be ended with an addition of reflection regarding the concept of al-‘Ta’āyush as basis of interreligious harmony in Worldview of Islam. The result of this study is that there are both external and internal factors accomplishing interreligious harmony in Tegalrejo. External factors consist community and family environment altogether with an interrelationship between its occupants. Internal factors, in the other hand, encompass mutual respect and understanding between Tegalrejo community.