Is Zen a Religion?

Yes, but perhaps not in the usual understanding of religion.  Unlike other major religions, Zen does not postulate or worship an external deity.  And although Buddhist teachings are studied and explored, Zen does not rely on religious doctrine or belief system.  Its primary emphasis is on meditation as the most direct way of gaining insight into ourselves, the nature of the world we live in, and how to live authentically.

However, as with other major religions, Zen emphasizes ceremony and ritual as an expression of "something greater," beyond the reach of consciousness, signifying the connectedness of all things.

For a more complete explanation,  please refer to the section "Essentials of Zen Practice."