CESR

CESR may refer to:


 * Center for Economic and Social Rights, an international human rights organization
 * Centre d'Etude Spatiale des Rayonnements, now the Institut de Recherche en Astrophysique et Planétologie (IRAP), in France
 * Committee of European Securities Regulators, replaced since 2011 by the European Securities and Markets Authority (ESMA)
 * Cornell Electron Storage Ring, a particle accelerator operated by Cornell University, in Ithaca (state of New York)
 * Carrier Ethernet Switches and Routers, a marketing term