ONM (disambiguation)

ONM may refer to:
 * Official Nintendo Magazine, a British video game magazine that ran from 2006 to 2014
 * Ohio Naval Militia, the naval militia of the State of Ohio
 * Operacioni Ndërkombëtar i Monitorimit, a monitoring operation set up to oversee the vetting process of judiciary members in Albania
 * Opera Nazionale Montessori, an Italian cultural institution and publishing house
 * Osage Nation Museum, devoted to Osage history, art, and culture