- Source: List of ship commissionings in 1940
- List of ship commissionings in 1940
- List of ship launches in 1940
- Lists of ship commissionings and decommissionings
- List of Kriegsmarine ships
- List of ship decommissionings in 1940
- List of Japanese Navy ships and war vessels in World War II
- List of active Brazilian Navy ships
- List of museum ships in North America
- List of aircraft carriers
- List of naval ships of Germany
The list of ship commissionings in 1940 includes a chronological list of ships commissioned in 1940. In cases where no official commissioning ceremony was held, the date of service entry may be used instead.