Terna may refer to:
Places Terňa, a village in the Prešov Region of Slovakia Terna River, Latur District, Maharashtra, India
Religion A terna is a list of three candidates for the office of bishop used in the episcopal selection process of the Roman Catholic Church
People Fredrick Terna (1923–2022), Austrian-born American artist
Companies Terna - Rete Elettrica Nazionale, the Italian electricity transmission operator GEK Terna, a Greek construction industry conglomerate Terna Energy, electric utilities branch of the Greek conglomerate GEK Terna
Organisations Grupo Terna, a unit of the National Police of Peru