Navy Department or Department of the Navy may refer to:

• United States Department of the Navy
• Navy Department (Ministry of Defence), in the United Kingdom, 1964–1997
• Confederate States Department of the Navy, 1861–1865
• Department of the Navy (Australia), 1939–1973

See also[edit]

• Department of Naval Services, in Canada, 1910–1922
• Ministry of the Navy (disambiguation)