The Trans-European Research and Education Networking Association (TERENA, ) was a not-for-profit association of European national research and education networks (NRENs) incorporated in Amsterdam, The Netherlands. The association was originally formed on 13 June 1986 as Réseaux Associés pour la Recherche Européenne (RARE) and changed its name to TERENA in October 1994. In October 2015, it again changed its name to GÉANT and at the same time acquired the shares of GEANT Limited (previously known as DANTE).

Terena can refer to:

• Terena people, an ethnic group in Brazil
• Terêna language, their language
• TERENA, Trans-European Research and Education Networking Association
• Terena (São Pedro), parish within the municipality Alandroal, Portugal