Major James Sproule Myles (1877 – 13 February 1956) was an Irish soldier, politician and rugby union player.
Myles played rugby for City of Derry and Ireland. In October 1899, together with Thomas Harvey, he was a member of the Ireland team that went on a tour of Canada. This was their first ever overseas tour. While playing, he broke his leg and he had to remain in Canada until December while the rest of the touring party returned home in November.
During World War I, Myles served in the British Army with both the Royal Inniskilling Fusiliers and the Royal Engineers. He won the Military Cross for bravery and reached the rank of Major.
Myles served as an independent Teachta Dála (TD) in Dáil Éireann for twenty years. He was elected on his first attempt at the 1923 general election and was subsequently re-elected six times. He initially represented Donegal but then switched to Donegal East when the 8-seat constituency was divided in 1937. He lost his seat in 1943, and was defeated again in 1944.
He died in 1956 and is buried at St. Anne's Church in Ballyshannon, County Donegal.