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