EMJ

EMJ may refer to:


 * Emergency Medicine Journal, a peer-reviewed medical journal
 * EMJ, ICAO code for Yellow Air Taxi, an American airline
 * EMJ, a brand name owned by Reliance Steel & Aluminum Co.
 * EMJ, a category of Missing persons in the United States National Crime Information Center
 * "EMJ (Emotional Musical Journey)", a bonus track on the 2011 album Welcome to Strangeland by Tech N9ne
 * EMJ Data Systems, a company started by Canadian entrepreneur Jim Estill
 * EMJ, Early Middle Japanese, spoken between 794 and 1185