RMR

RMR may refer to:


 * RMR (revolver), a .357 double-action revolver
 * RMR (singer), an American singer and rapper
 * RMR layout (of an automobile), see rear mid-engine, rear-wheel-drive layout
 * Recife Metropolitan Region in Northeastern Brazil
 * Recurring Monthly Revenue, a measure of customer attrition
 * Registered Merit Reporter, a certification offered by the National Court Reporters Association
 * Reliability Must Run, a contract in an electrical market
 * Resting metabolic rate, see basal metabolic rate
 * Revelstoke Mountain Resort, a Canadian ski resort located in Revelstoke, British Columbia
 * Rick Mercer Report, a Canadian comedy television series
 * Robust mouse rejuvenation, rejuvenating an elderly mouse so that its remaining life expectancy is doubled
 * Rock mass rating, a rock mass classification system (geotechnical engineering)
 * RockMyRun, a running/workout mobile app
 * Royal Marines Reserve, the volunteer reserve force used to augment the regular Royal Marines
 * The Royal Montreal Regiment, a Canadian Forces infantry regiment based in Montreal
 * Ruggedized miniature reflex (optics), a type of weapon-mounted red dot sight for guns