Powerful may refer to:
, 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
See also Dynatoi (English: "powerful"), a Byzantine Empire legal term for the senior levels of civil, military and ecclesiastic officialdom Hyang, a representation of the supreme being in ancient Java and Balinese mythology, also referred to as Sang Hyang Kersa ("the Powerful") Powerful owl, a species of owl native to Australia