Harald or Harold is the name of several kings:

Kings of Denmark

• Harold I of Denmark (c. 911–November 1 987), also known as Harald Bluetooth.
• Harold II of Denmark
• Harald III of Denmark

Kings of England

• Harold I of England, also known as Harold Harefoot.
• Harold II of England (c. 1022 - October 14, 1066), also known as Harold Goodwinson.

Kings of Norway

• Harald I of Norway (c. 848–c. 931), also known as Harald Fairhair.
• Harald II of Norway (died 969)
• Harald III of Norway (born 1015– died Stamford bridge, England, September 25 1066), also known as Harald Hårdråde.
• Harald IV of Norway, died 1136.
• Harald V of Norway, born February 21, 1937

Grand Dukes of Kiev

• Mstislav the Great, known as Harald in Norse Sagas