Five ships and a shore establishment of the Royal Navy have been named HMS Mersey after the River Mersey:

Ships

  • was a 26-gun sixth rate launched in 1814, used for harbour service from 1832, and broken up in 1852.
  • was a wooden screw frigate launched in 1858 and sold in 1875.
  • was a protected cruiser launched in 1885 and sold in 1905.
  • was a monitor launched in 1913 for Brazil, but purchased by the Royal Navy in 1914 and sold in 1921.
  • is a offshore patrol vessel launched in 2003 and currently in service.

Shore establishments

  • was the Navy's Liverpool depot, established as a branch of and commissioned in 1940, and paid off in 1946.

Tenders

  • HMS Mersey was the name borne by a number of tenders to the Mersey Division Royal Naval Reserve
  • HM Motor minesweeper 1075 was HMS Mersey between 1949 and 1956.

Two Ton-class minesweepers bearing the name HMS Mersey served as tenders to the Mersey Division RNR.

  • HMS Amerton M1105 was HMS Mersey between 1954 and 1959.
  • HMS Pollington M1173 was HMS Mersey between 1959 and 1975.

Battle honours

  • Belgian Coast, 1914–15
  • Königsberg, 1915