Naval Reserve Merchant Marine Insignia was a breast insignia of officers in the United States Merchant Marine who also served in the United States Navy or United States Navy Reserve. The insignia was replaced by the Strategic Sealift Officer Warfare Insignia (SSOWI) in June 2011, per OPNAVINST 1534.1D.

The United States Merchant Marine is an organization composed of United States civilian mariners and U.S. civilian and federally owned merchant vessels. Both the civilian mariners and the merchant vessels are managed by a combination of the government and private sectors, and engage in commerce or transportation of goods and services in and out of the navigable waters of the United States. The Merchant Marine primarily transports domestic and international cargo and passengers during peacetime, and operate and maintain deep-sea merchant ships, tugboats, towboats, ferries, dredges, excursion vessels, charter boats and other waterborne craft on the oceans, the Great Lakes, rivers, canals, harbors, and other waterways. In times of war, the Merchant Marine can be an auxiliary to the United States Navy, and can be called upon to deliver military personnel and materiel for the military.