Nomos (plural: Nomoi) can refer to:

• the prefectures of Greece, the administrative division immediately below the peripheries of Greece (Greek: νομός, pl. νομοί)
• the subdivisions of Ancient Egypt, see Nome (subnational division)
• law (Greek: νόμος, pl. νόμοι). It is the origin of the suffix -onomy, as in astronomy, economy, taxonomy.
• In Greek mythology, the spirit of law
• In the sociology of religion of Peter L. Berger, nomoi are meaningful orders or worldviews of individuals.
• a German watch company
• a magazine published in the 1980s and 1990s, connected with the libertarian movement
• Nomos --> an orderly world operating according to understandable laws.