There are many, many religions which are active on Urantia. Many of them claim to be the "only one true religion," but that would not make much sense, would it? They cannot all be the only true religion, but even so, all have their value. From The Urantia Book:
The many religions of Urantia are all good to the extent that they bring man to God and bring the realization of the Father to man. It is a fallacy for any group of religionists to conceive of their creed as The Truth; such attitudes bespeak more of theological arrogance than of certainty of faith. There is not a Urantia religion that could not profitably study and assimilate the best of the truths contained in every other faith, for all contain truth. Religionists would do better to borrow the best in their neighbors' living spiritual faith rather than to denounce the worst in their lingering superstitions and outworn rituals. (1012.4) 92:7.3 [2]
Institutional religion cannot afford inspiration and provide leadership in this impending world-wide social reconstruction and economic reorganization because it has unfortunately become more or less of an organic part of the social order and the economic system which is destined to undergo reconstruction. Only the real religion of personal spiritual experience can function helpfully and creatively in the present crisis of civilization. [3] (1087.4) 99:2.1 [3]
Jesus taught:
"The prophets have all taught you that Yahweh cares for his people, that God loves Israel. But I have come among you to proclaim a greater truth, one which many of the later prophets also grasped, that God loves you--every one of you--as individuals. All these generations have you had a national or racial religion; now have I come to give you a personal religion." Jesus, (1629.5) 145:2.4 [4]