Faith is confidence or trust in a particular religious belief system.
Faith may also refer to:
- Bad faith, a legal concept in which a malicious motive on the part of a party in a lawsuit undermines their case
- Bad faith (existentialism), mauvaise foi, a philosophical concept wherein one denies one's total freedom, instead choosing to behave as an inert object
- Fáith, the Irish for "prophet, seer"
- Good faith, bona fides, the mental and moral state of honesty
- Religion, any specific system of belief ("one's faith")
- Religious belief, the belief in the reality of the mythological, supernatural, or spiritual aspects of a religion
- The first of the theological virtues in Catholic theology
- Trust (social science) in a person or entity
- Uberrima fides (Utmost good faith), the legal doctrine of certain contractual obligations