USS ''Guardian'' may refer to the following ships of the
United States Navy:
* , launched as the
Liberty ship SS ''James G. Squires'' in 1945; placed in reserve at the end of World War II, converted to a radar picket ship and recommissioned as USS ''Guardian'' in 1955, decommissioned in 1965, and scrapped in 1971
* , a
PT boat under the Potomac River Naval Command; named USS ''Guardian'' in November 1959 (official designation remained ''PT-809'')
* , an that was launched in 1987, commissioned in 1989, and grounded on a reef and decommissioned in 2013.
{{DEFAULTSORT:Guardian
United States Navy ship names