The 63rd (2nd Northumbrian) Division of the British Army was a second-line Territorial Force division, formed in 1914, which served on home defence duties during the First World War. The division was formed as a duplicate of the 50th (Northumbrian) Division in 1914, composed primarily of soldiers recruited in north-eastern England. It remained on home defence and training duties in the north-east and east of England until 1916, when it was disbanded. Several of its constituent units would later serve overseas, deployed for support and garrison duties in almost every theatre of the war.