The list of submarine classes in service includes all submarine classes currently in service with navies or other armed forces worldwide. For surface combatants, see the list of naval ship classes in service.
| Class | Builder | Displacement Tonnes | Operator | In Service | Built | Under Construction | Comments |
|---|---|---|---|---|---|---|---|
| Arihant class (Project ATV) | 7,000 | 3 | 4 | 0 | |||
| Borei class (Project 955 Borey) | 24,000 | 7 | 7 | 3 | |||
| Delta class (Project 667BDR Kal'mar / 667BDRM Del'fin) | 18,200 | 8 | 9 | 0 | Including 2 Delta III (1 in special operations role, the other (Ryazan) reclassified as SSN) [2] [3] [4] and 6 Delta IV (1 special ops) [5] | ||
| Type 094A/094 | 11,000 | 6 | 6 | 2 | |||
| Ohio class (SSBN-726) | 18,750 | 14 | 18 | 0 | 24 planned 6 cancelled, 4 converted to SSGN | ||
| Triomphant class | 14,335 | 4 | 4 | 0 | |||
| Vanguard class | 15,900 | 4 | 4 | 0 | |||
| Type 092 submarine | 8,000 | 1 | 1 | 0 |
| Class | Builder | Displacement Tonnes | Operator | In Service | Built | Under Construction | Comments |
|---|---|---|---|---|---|---|---|
| Ohio class (Tactical Trident) | 18,750 | 4 | 4 | 0 | converted from SSBN | ||
| Oscar class (Project 949 Granit/Project 949A Antey) | 19,400 | 6 | 14 | 0 | 2 being modernized, 1 inactive/reserve, 4 scrapped, 1 lost at sea | ||
| Type 093 submarine (Type 093G) | 7,000 | 1 | 1 | 0 | Only G variant of the Shang-class submarine is capable of launching guided cruise missiles | ||
| Yasen class | 13,800 | 5 | 6 | 3 | Boat 6 on sea trials as of 2025; total of 12 planned |
| Class | Builder | Displacement Tonnes | Operator | In Service | Built | Under Construction | Comments |
|---|---|---|---|---|---|---|---|
| Akula class (Project 971 Shchuka) | 13,800 | 4 | 15 | 0 | 5 undergoing modernization | ||
| Astute class | 7,400 | 5 | 6 | 1 | Boat 6 (Agamemnon) commissioned but in pre-sea trial testing as of September 2025 | ||
| Barracuda class | 5,300 | 3 | 3 | 3 | 3 in service; total of 6 planned | ||
| Type 091 submarine | 4,500 | 3 | 5 | 0 | |||
| Los Angeles class (SSN-688) | 7,000 | 24 | 62 | 0 | 35 submarines retired | ||
| Rubis class | 2,670 | 2 | 6 | 0 | 4 retired | ||
| Seawolf class (SSN-21) | 9,300 | 3 | 3 | 0 | 29 originally planned, 3rd in class built substantially modified for special missions | ||
| Type 093 | 8,000 | 6 | 6 | 0 | |||
| Sierra class (Project 945) | 10,400 | 2 | 4 | 0 | 2 reserve/undergoing modernization | ||
| Victor class | 7,250 | 2 | 48 | 0 | 46 retired | ||
| Virginia class | 7,900-10,200 | 22 | 24 | 9 | 66 planned |