William Aitken Poole (September 1, 1831 – August 28, 1903) was a farmer, merchant and political figure on Prince Edward Island.
He represented 4th Prince in the Legislative Assembly of Prince Edward Island from 1879 to 1882 as a Conservative.
He was born in Murray Harbour, Prince Edward Island, the son of John Poole.
He married Christina Leslie in 1860.
He was defeated when he ran for reelection in 1882.