The United States Naval Institute (USNI), based in Annapolis, Maryland, is a private, non-profit, professional military association that seeks to offer independent, nonpartisan forums for debate of national defense and security issues. In addition to publishing magazines and books, the Naval Institute holds several annual conferences.

Established in 1873, the Naval Institute claimed "almost 50,000 members" in 2020, mostly active and retired personnel of the United States Navy, Marine Corps, and Coast Guard. The organization also has members in over 90 countries.

The organization has no official or funding ties to the United States Naval Academy or the U.S. Navy, although it is based on the grounds of the Naval Academy through permission granted by a 1936 Act of Congress.

The Naval Institute's mission is "to provide an independent forum for those who dare to read, think, speak, and write to advance the professional, literary, and scientific understanding of sea power and other issues critical to global security". The institute also has a Vision of "[g]iving voice to those who seek the finest Navy, Marine Corps, and Coast Guard."

The United States Naval Academy (USNA, Annapolis, or simply Navy) is a federal service academy adjacent to Annapolis, Maryland. Established on 10 October 1845, under Secretary of the Navy George Bancroft, it is the second oldest of the five U.S. service academies, and educates officers for commissioning primarily into the United States Navy and United States Marine Corps. The 338-acre (137 ha) campus is located on the former grounds of Fort Severn at the confluence of the Severn River and Chesapeake Bay in Anne Arundel County, 33 miles (53 km) east of Washington, D.C., and 26 miles (42 km) southeast of Baltimore. The entire campus (known to insiders as "the Yard") is a National Historic Landmark and home to many historic sites, buildings, and monuments. It replaced Philadelphia Naval Asylum, in Philadelphia, that served as the first United States Naval Academy from 1838 to 1845, when the Naval Academy formed in Annapolis.Candidates for admission generally must both apply directly to the academy and receive a nomination, usually from a member of Congress. Students are officers-in-training with the rank of midshipman. Tuition for midshipmen is fully funded by the Navy in exchange for an active duty service obligation upon graduation. Approximately 1,200 "plebes" (an abbreviation of the Ancient Roman word plebeian) enter the academy each summer for the rigorous Plebe Summer. About 1,000 midshipmen graduate. Graduates are commissioned as either ensigns in the Navy or second lieutenants in the Marine Corps, but a small number can also be cross-commissioned as officers in other U.S. services, and the services of allied nations. The United States Naval Academy has some of the highest paid graduates in the country according to starting salary. The academic program grants a Bachelor of Science degree with a curriculum that grades midshipmen's performance upon a broad academic program, military leadership performance, and mandatory participation in competitive athletics. Midshipmen are required to adhere to the academy's Honor Concept.