HNLMS Mercuur () may refer to the following ships of the Royal Netherlands Navy that have been named after Mercuur:
, a submarine tender and torpedo maintenance and repair ship that served during World War II and was captured by the where it served under the name Merkur (HI 1). HNLMS Mercuur (1973), an that was renamed to HNLMS Mercuur in 1973 upon which she was recommissioned as a submarine tender. , a submarine support ship and torpedo maintenance and repair ship in service from 1987.
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