Insar

Insar may refer to:
 * Insar (inhabited locality), several inhabited localities in Russia
 * Insar Urban Settlement, a municipal formation into which the town of district significance of Insar in Insarsky District of the Republic of Mordovia, Russia is incorporated
 * Insar (river), a river in the Republic of Mordovia, Russia
 * Interferometric synthetic aperture radar (InSAR), a radar technique used in geodesy
 * International Society for Autism Research (INSAR), sponsored by the Autism Research Institute
 * Ahmed Insar, a candidate in the Nottingham City Council election, 2011 (England)
 * Ansar, Lebanon