Sir John Stewart, 1st Baronet (c.1758 – 22 June 1825) was an Irish lawyer and politician. He was son of Church of Ireland clergyman, the Reverend Hugh Stewart, Rector of Termonmaguirk, County Tyrone. He was educated in Drogheda and at Trinity College, Dublin, studied law at Lincoln's Inn, and was called to the Irish Bar in 1781.
In 1794, he was elected to the Irish House of Commons for Augher. At the 1797 elections, he was elected for four constituencies: Askeaton, Bangor, Portarlington and Strabane. He chose to sit for Bangor, and held that seat until the dissolution of the Parliament of Ireland when the Act of Union came into effect in 1801. He was Solicitor-General for Ireland from 1798 to 1799 and Attorney-General for Ireland from 1799 to 1803. He was High Sheriff of County Tyrone in 1809.
Driving a two horse carriage while suffering from long term sickness, he was badly injured when his horses bolted and died four days later in June 1825. He was succeeded in the baronetcy by his elder son, Hugh.
-  History of Parliament Online article.
- "Irish House of Commons 1692–1800". Leigh Rayment's House of Commons pages. Archived from the original on 1 June 2009. Retrieved 23 November 2009.CS1 maint: unfit URL (link)
- "House of Commons constituencies beginning with "T" (part 2)". Leigh Rayment's House of Commons pages. Archived from the original on 15 July 2018. Retrieved 23 November 2009.CS1 maint: unfit URL (link)
- Hansard 1803–2005: contributions in Parliament by Sir John Stewart