Sir William Young, 1st Baronet (1771-1848), was an Irish baronet.
Born on the outskirts of Loughgall in the north of County Armagh, he was the son of the Reverend John Young and Anne McClintock (she was from Trentagh in County Donegal). On 20 September 1806, he married Lucy Frederick (died 8 August 1856), daughter of Sir Charles Frederick and Hon. Lucy Boscawen. They had two daughters and five sons:
In 1814, William Young bought the Bailieborough Castle estate in County Cavan, Ireland, from Thomas Charles Stewart Corry. Young laid out the town of Bailieborough in its present location and was created the 1st Young Baronet of Bailieborough Castle on 28 August 1821. In the 1830 United Kingdom general election, he was an unsuccessful candidate for the Cavan constituency.
Sir William died on 10 March 1848, and he was succeeded by his eldest son, John Young, as 2nd Baronet.