HMS St George (1785) was a 98-gun second rate, launched in 1785 and wrecked in 1811.
HMS St George was originally HMS Britannia of 1762, renamed HMS Princess Royal in 1812, HMS St George a few days later, and then HMS Barfleur in 1819. She was broken up in 1825.
HMS St George (1840) was a 120-gun first rate, launched in 1840 and sold in 1883.