CIAR may refer to:
Canadian Institute for Advanced Research, a virtual institute dedicated to collaborative advanced research and scholarship of relevance to the Canadian and global community Center for Indoor Air Research, a non-profit organization established by the tobacco industry in 1988 Cornell International Affairs Review, a biannual, peer-reviewed student-run academic journal at Cornell University Rozas Airborne Research Center (), an aerodrome in Castro de Rei, Galicia, Spain