According to Wikipedia the US Navy has:
- Los Angeles class (29 in commission, 2 in reserve) – fast attack submarines
- Ohio class (18 in commission) – 14 ballistic missile submarines (SSBNs), 4 guided missile submarines (SSGNs)
- Seawolf class (3 in commission) – fast attack submarines
- Virginia class (19 in commission, 1 delivered, 1 fitting out, 7 under construction, 2 on order) – fast attack submarines
The existing fleet of ballistic submarines currently carries 54 percent of the United States' nuclear deterrent arsenal.
