USS Delaware may refer to one of the six United States Navy ships named for the U.S. state of Delaware (the first state in the Union):

1. USS Delaware (1776), a 24-gun frigate built in 1776 and captured by the British in 1777
2. USS Delaware (1798), a 20-gun ship purchased in 1798
3. USS Delaware (1820), a 74-gun ship of the line, launched in 1820 and burned in 1861
4. USS Delaware (1861), a side-wheel steamer built in 1861 and decommissioned in 1865
5. USS Delaware (1869), a screw steamer renamed from Piscataque in 1869
6. USS Delaware (BB-28), a battleship commissioned in 1910 and scrapped in 1924