American submarine, introduced in 1981, displaces 16,764 tons and has a crew of 155.
| Subtype | Nuclear-powered ballistic missile submarine |
| Displacement | 16764 tons |
| Displacement submerged | 18750 tons |
| Crew | 155 members |
| Width | 13.0 m (42.7 ft) |
| Length | 170.0 m (557.7 ft) |
| Max. depth | 240 m (787.4 ft) |
| Propulsion | 1× S8G PWR nuclear reactor, 2× geared turbines; 35,000 shp (26 MW), 1x Fairbanks Morse auxiliary diesel, 1× 325 hp (242 kW) auxiliary motor, 1 shaft with seven-bladed screw |
| Range | Unlimited, except by food supplies |
| Endurance | 90 days |
| Maximum speed | 12 knots |
| Max. speed submerged | 25 knots |
The Ohio class was designed in the 1970s to carry the Trident submarine-launched ballistic missile. Constructed by General Dynamics Electric Boat, the class consists of 18 vessels commissioned between 1981 and 1997. The design succeeded the Benjamin Franklin class and is scheduled for replacement by the Columbia class.
The class utilizes the SCB-304 hull design, constructed in four-deck sections. Propulsion is provided by a pressurized water reactor and geared turbines. Each vessel employs a dual-crew system, designated Blue and Gold, to maintain operational availability during deterrent patrols. To facilitate maintenance and resupply, the hull incorporates logistics hatches that allow for the transfer of supply pallets and machinery modules.
The fleet includes two configurations: ballistic missile submarines (SSBN) and guided-missile submarines (SSGN). SSBN variants carry submarine-launched ballistic missiles as part of the United States nuclear-deterrent triad. SSGN variants, converted from the oldest hulls in the class, carry cruise missiles and include swimmer lockout chambers for special operations personnel. These converted vessels can host submersibles and dry deck shelters. All vessels are equipped with torpedo tubes and a suite of passive bow-mounted, towed, and conformal sonar arrays.
Vessels are stationed at Naval Base Kitsap, Washington, and Naval Submarine Base Kings Bay, Georgia. The SSBNs maintain a schedule of deterrent patrols, with a portion of the fleet kept on station in designated areas. Between 2002 and 2008, the Navy converted the first four boats of the class—Ohio, Michigan, Florida, and Georgia—from ballistic missile to guided-missile configurations to support conventional land-attack and special operations missions. During the same period, the remaining SSBNs were updated to carry the Trident II D5 missile. In 2017, the missile tube capacity of the SSBN fleet was reduced to comply with the New START treaty. Current naval planning involves retiring the class as the Columbia and Virginia classes enter service, though the Navy has considered service life extensions for specific hulls.
The Ohio-class guided-missile submarine USS Georgia returned to Naval Submarine Base Kings Bay on July 27, 2026, ahead of an inactivation that formally begins on July 31 after 42 years of service. Her three sister SSGNs follow by fiscal 2029, with no direct replacement in the pipeline.