John Sargent (April 6, 1792 – August 7, 1874) was a farmer, merchant and political figure in Nova Scotia. He represented Barrington township in the Legislative Assembly of Nova Scotia from 1736 to 1740 as a Conservative.
He was born in Barrington, Nova Scotia, the son of John Sargent and Margaret Whitney. In 1818, he married Sarah Wright Doane. Sargent was a justice of the peace and a captain in the militia. He died in Barrington at the age of 82.
His brothers William Browne and Winthrop also served in the assembly.