MP Portarlington is in MP Ireland.
In 1689 Henry Bond 2nd Baronet was elected MP Portarlington.
After 1727 William Flower 1st Baron Castle Durrow [aged 41] was elected MP Portarlington.
In 1784 Robert Hobart [aged 23] was elected MP Portarlington which seat he held until 1790.
In 1790 Richard Cavendish 2nd Baron Waterpark [aged 24] was elected MP Portarlington which seat he held until 1797.