The Great Northern War was a 1700–1721 conflict primarily between Sweden and Russia. Northern War, Northern Wars, or War in the North can also refer to:
Any one of the Northern Wars, a loosely-defined series of conflicts which concluded with the 1700–1721 war
The Flagstaff War in Northern New Zealand, 1845-1846
The War in the North, a campaign of the Spanish Civil War in 1937