List of ship decommissionings in 1940

The list of ship decommissionings in 1940 includes a chronological list of ships decommissioned in 1940. In cases where no official decommissioning ceremony was held, the date of withdrawal from service may be used instead. Notably, several destroyers were decommissioned by the United States Navy during 1940 for immediate transfer to the Royal Navy under the Destroyers for Bases Agreement between the two nations.

Date	Operator	Ship	Class and type	Fate and other notes	Ref
9 September	United States Navy	Aaron Ward	Wickes-class destroyer	decommissioned at Halifax and transferred to the Royal Navy	[1]
9 September	United States Navy	Abel P. Upshur	Clemson-class destroyer	decommissioned at Halifax and transferred to the Royal Navy as HMS Clare	[2]
23 September	United States Navy	Abbot	Wickes-class destroyer	decommissioned at Halifax and transferred to the Royal Navy	[3]
11 October	United States Navy	Evans	Wickes-class destroyer	transferred to the Royal Navy	[citation needed]
11 October	United States Navy	Philip	Wickes-class destroyer	transferred to the Royal Navy	[citation needed]
11 October	United States Navy	Wickes	Wickes-class destroyer	transferred to the Royal Navy	[citation needed]
26 November	United States Navy	Fairfax	Wickes-class destroyer	transferred to the Royal Navy	[citation needed]
26 November	United States Navy	Sigourney	Wickes-class destroyer	transferred to the Royal Navy	[citation needed]