In 1545 John Arundell (age 15) was elected MP Helston.

In 1572 William Killigrew (age 17) was elected MP Helston.

In 1614 Robert Killigrew (age 34) was elected MP Helston at Bath, Somerset [Map].

In 1621 Thomas Stafford (age 47) was elected MP Helston.

In 1625 Francis Godolphin (age 19) was elected MP Helston.

In 1628 Sidney Godolphin (age 17) was elected MP Helston.

In 1665 William Godolphin 1st Baronet (age 25) was elected MP Helston.

On 04 Feb 1702 Francis Godolphin 2nd Earl Godolphin (age 23) was elected MP Helston.

On 15 Dec 1708 John Evelyn 1st Baronet (age 26) was elected MP Helston at a by-election. He didn't stand for election in 1710.

In 1727 John Evelyn 2nd Baronet (age 20) was elected unopposed MP Helston.

In 1734 John Evelyn 2nd Baronet (age 27) was elected unopposed MP Helston.

In 1741 Francis Godolphin 2nd Baron Goldolphin (age 34) was elected MP Helston.

In 1747 John Evelyn 2nd Baronet (age 40) was elected MP Helston.

In 1754 John Evelyn 2nd Baronet (age 47) was elected unopposed MP Helston.

In 1761 John Evelyn 2nd Baronet (age 54) was elected unopposed MP Helston.

In 1774 Francis Osborne 5th Duke Leeds (age 22) was elected MP Helston.

In 1799 Francis Osborne 1st Baron Godolphin (age 21) was elected MP Helston.

In 1802 James Edward Harris 2nd Earl Malmesbury (age 23) was elected MP Helston.

In 1820 Francis Godolphin Osborne 7th Duke Leeds (age 21) was elected MP Helston.

In 1830 Samuel John Brooke-Pechell 3rd Baronet (age 44) was elected MP Helston which seat he held until 1831.

In 1837 George John Frederick Sackville (age 22) was elected MP Helston.