The United States Navy

- Ohio class ballistic missile submarines (18 in commission, with 4 converted into guided missile submarines)
- Los Angeles class attack submarines (43 in commission, 2 in reserve, 17 decommissioned)
- Seawolf class attack submarines (3 in commission)
- Virginia class attack submarines (7 in commission, 3 under construction, 4 ordered, at least 4 more planned)