Prince Frederick William Henry Augustus of Prussia (German: Friedrich Wilhelm Heinrich August; 19 September 1779 – 19 July 1843) was a Prussian royal and general.

Born on Friedrichsfelde Palace, he was the youngest son of Prince Augustus Ferdinand of Prussia, the brother of King Frederick the Great, and Margravine Elisabeth Louise of Brandenburg-Schwedt.

August joined the Prussian army as a young man, earning the rank of captain by eighteen years old.

In March 1808, his cousin, King Frederick William III of Prussia, made him brigadier general.

Although he was one of the richest landowners in Prussia, his estates reverted to the Crown upon his death, since he never left any legitimate heirs.