Powerful

Powerful may refer to:


 * HMS Powerful, four ship and two training establishments of the Royal Navy
 * Powerful-class cruiser, a class of two Royal Navy protected cruisers
 * Haakon Sigurdsson (c. 937–995), de facto ruler of Norway from about 975 to 995, sometimes called Haakon the Powerful
 * Powerful (song), a 2015 song by Major Lazer