At least six ships of the Spanish Navy have been named Neptuno:
Neptuno was a 66-gun ship of the line acquired in 1740 and sold in 1748
Neptuno was a 68-gun ship of the line launched 6 July 1754, commissioned in 1754 and scuttled in la Havana in 1762
Neptuno was an 80-gun Montañes-class ship of the line launched in 1795 and wrecked in 1805
Neptuno was an 80-gun ship of the line, previously the French ship Neptune. She was captured in 1808 and broken up in 1820.
Neptuno (F-01) was a Júpiter class gunboat-minelayer, commissioned in 1939, reclassified as a frigate and decommissioned in 1972
Neptuno (A-20) is a submarine rescue ship, active since 1989.
