EP, ep, or Ep may refer to:
The Episcopal Church (TEC) in the United States is a member church of the worldwide Anglican Communion.
Epistemology ( (listen); from Greek, Modern ἐπιστήμη, epistēmē, meaning 'knowledge', and λόγος, logos, meaning 'logical discourse') is the branch of philosophy concerned with the theory of knowledge.Epistemology is the study of the nature of knowledge, justification, and the rationality of belief.
Epiphany ( i-PIF-ə-nee), also Theophany, Denha, Little Christmas, or Three Kings' Day, is a Christian feast day that celebrates the revelation of God incarnate as Jesus Christ.
Epilepsy is a group of neurological disorders characterized by epileptic seizures. Epileptic seizures are episodes that can vary from brief and nearly undetectable periods to long periods of vigorous shaking.
Epidemiology is the study and analysis of the distribution (who, when, and where) and determinants of health and disease conditions in defined populations.
Epigenetics is the study of heritable phenotype changes that do not involve alterations in the DNA sequence.
The Epic of Gilgamesh () is an epic poem from ancient Mesopotamia that is often regarded as the earliest surviving great work of literature.
The Epstein–Barr virus (EBV), also called human herpesvirus 4 (HHV-4), is one of eight known human herpesvirus types in the herpes family, and is one of the most common viruses in humans.
Ephedrine is a medication and stimulant. It is often used to prevent low blood pressure during spinal anesthesia.