Hanoi is home of many major religions in Vietnam. Religious activities are more active, diverse, abundant and become more orderly. From an overview of the religion appearance in Hanoi, this thesis provides some of the religious features in Hanoi. At the same time, the thesis studies the process of formation, development and main activities of some typical religions in Hanoi in the current context such as Buddhism, Catholicism, Protestantism, Caodaism, Baha'i Faith, Islam and the Buddhist association of Theravada - Minh Su Dao. Thereby, we can see that the activities of the religions in Hanoi city are always diverse, abundant and have a direct influence on the life of the people in Hanoi city.