ISEC

ISEC may refer to:
 * Institute for Social and Economic Change in India
 * Instituto Superior de Educação e Ciências in Portugal
 * Instituto Superior de Engenharia de Coimbra in Portugal
 * International Society for Ecology and Culture, a.k.a. Local Futures
 * International Space Elevator Consortium
 * International Structural Engineering and Construction Society
 * Interdisciplinary Science and Engineering Complex, at Northeastern University