See what a can of worms we can open with matters of faith? While I would concede that this can be an important consideration, and that one may not wish to enter into a relationship outside there faith, restricting this to a specific demonination can be severely limiting. If you are Roman Catholic or Baptist, or one of the other large demonimations, you may not have much problem. But what if you belong to one of the demoninations where there are only a million members worldwide? The probability that you would find a mate is virtually non-existent. So flexibility and tolerance of the beliefs of others is a must. It is only important that the doctrines of the faiths of the partners not be too dissimilar. Still "mixed" marrages can and do work all the time. I knew an elderly couple where the man was Southern Baptist and his wife was a devout Roman Catholic, who considered the Second Vatican Council an abomination. Now that is mixed! Yet, they were very happily married for over 50 years (he died) and only attended church together on special occasions. There were consessions to be made, though. The Roman Church doesn't require a member's spouse be Catholic, but the couple must marry in the Catholic Church and the children of the union must be raised Catholic.

If religion is this important to you, you must only date people who believe similarly.