美国海军学院（United States Naval Academy，缩写USNA）又名安纳波利斯海军学院，是美国海军和美国海军陆战队的军官基础本科教育学校，位于马里兰州的安那波利斯。

学院的格言是“ex scientia tridens”，字面上来翻译这句拉丁文的意思是“三叉戟是用知识铸造的”；「三叉戟」是希腊神话－海神波塞冬的武器，是海军力量的标志；因此，意译这句话的意思是“制海权来自于知识”。学院也使用海军“荣誉、勇气和奉献”以及“卓越但不高傲”等格言。

The United States Naval Academy (also known as USNA, Annapolis, or simply Navy) is a four-year coeducational federal service academy in Annapolis, Maryland, United States. Established in 1845 under Secretary of the Navy George Bancroft, it is the second oldest of the United States' five 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 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.