John Prendergast-Smyth, 1st Viscount Gort (1742 – 23 May 1817) was an Irish politician.
Born John Smyth, Gort was the son of Charles Smyth, Member of the Irish Parliament for Limerick City, and Elizabeth Prendergast.
In 1810 he was raised to the Peerage of Ireland as Baron Kiltarton, of Gort in the County of Galway, and in 1816 he was further honoured when he was made Viscount Gort, also in the Peerage of Ireland.
Lord Gort also served as Governor of County Galway from 1812 to 1817.
He died unmarried on 23 May 1817, and was succeeded in his titles according to the special remainder by his nephew Charles Vereker.