In 1572 Henry Brouncker Lord President Munster (age 22) was elected MP Westbury.

In 1597 James Ley 1st Earl of Marlborough (age 45) was elected MP Westbury.

In 1628 Charles Thynne (age 60) was elected MP Westbury.

In 1640 William Wheler 1st Baronet (age 29) was elected MP Westbury which seat he held until excluded in 1648.

In Feb 1659 William Wheler 1st Baronet (age 48) was elected MP Westbury which seat he held until Apr 1659.

In 1747 Paul Methuen (age 23) was elected MP Westbury which seat he held until 1748.

In 1795 Edward Bootle-Wilbraham 1st Baron Skelmersdale was elected MP Westbury.

In 1802 William Baldwin (age 65) was elected MP Westbury which seat he held until 1806.

In 1831 Henry Frederick Stephenson (age 40) was elected MP Westbury which seat he held until 1832.