ISAR

ISAR or Isar may refer to:

ISAR

 * Intergovernmental Working Group of Experts on International Standards of Accounting and Reporting
 * International Search and Rescue Competition
 * Institute for the Study of Academic Racism
 * Inverse synthetic aperture radar, a technique to generate two-dimensional radar images of a target
 * Intelligible semi-automated reasoning, the formal proof language of the Isabelle proof assistant

Isar

 * Isar, a German river
 * Isar Nuclear Power Plant, on the river
 * Isar, Province of Burgos, a municipality located in Castile and León, Spain
 * Isar Rural District, Iran
 * Isar, Marvinci, North Macedonia, an archaeological site
 * Isar Aerospace, a private German launch vehicle company
 * Glas Isar, a small car produced by Hans Glas GmbH