John Maxwell, 1st Baron Farnham (1687 – 6 August 1759) was an Irish peer and politician. He was the son of the Reverend Robert Maxwell and Anne Stewart, daughter of Colonel George Stewart. His paternal grandfather was Robert Maxwell, Bishop of Kilmore. He had married in 1719 Judith Barry, daughter of James Barry of Newton Barry and Anne Meredyth, and had the following children: He died in August 1759 and was succeeded in the barony by his son Robert. In 1760 Robert was created Viscount Farnham and three years later created Earl of Farnham.