John Plunket, 3rd Baron Plunket

John Span Plunket, 3rd Baron Plunket of Newtown, County Cork (10 July 1793 – 16 April 1871) was an Irish peer and Queen's Counsel. He was the second son of William Plunket, 1st Baron Plunket, and Catherine MacAusland. He succeeded his brother Thomas Plunket, 2nd Baron Plunket in 1866. He married Charlotte, daughter of the eminent judge Charles Kendal Bushe.

Children of John Span Plunket, 3rd Baron Plunket of Newton