In 1402 Richard Arches of Eythrop was elected MP Buckinghamshire.

In 1529 Francis Bryan (age 39) was elected MP Buckinghamshire (there is some uncertainty about this). He was returned in the Parliaments in 1539, 1542 and 1545.

In 1529 John Russell 1st Earl Bedford (age 44) was elected MP Buckinghamshire.

In Oct 1553 Edmund Peckham (age 58) was elected MP Buckinghamshire.

In Nov 1554 Edmund Peckham (age 59) was elected MP Buckinghamshire.

In 1593 Robert Dormer 1st Baron Dormer (age 41) was elected MP Buckinghamshire.

In 1604 Edward Tyrrell (age 53) was elected MP Buckinghamshire which seat he held until his death on 29 Jan 1606.

In 1614 William Borlase of Little Marlow (age 50) was elected MP Buckinghamshire.

In 1660 Thomas Tyrell (age 65) was elected MP Buckinghamshire.

In 1722 William Heathcote 1st Baronet (age 28) was elected MP Buckinghamshire.

In 1741 Richard Grenville-Temple 2nd Earl Temple (age 29) was elected MP Buckinghamshire which seat he held until 1747.