Jenkinson was baptised on 29 June 1770 at St. Margaret's, Westminster, the son of George III's close adviser Charles Jenkinson, later the first Earl of Liverpool, and his first wife, Amelia Watts.
Jenkinson's 19-year-old mother, who was the daughter of a senior East India Company official, William Watts, and of his wife Begum Johnson, died from the effects of childbirth one month after his birth.
Through his mother's ancestry, Jenkinson was also one-eighth Indian.

Jenkinson was educated at Charterhouse School and Christ Church, Oxford.
In the summer of 1789, Jenkinson spent four months in Paris to perfect his French and enlarge his social experience.
He returned to Oxford for three months to complete his terms of residence, and in May 1790 was created Master of Arts.

He won election to the House of Commons in 1790 for Rye, a seat he would hold until 1803; at the time, however, he was below the age of assent to Parliament, so he refrained from taking his seat and spent the following winter and early spring in an extended tour of the continent.
This tour took in the Netherlands and Italy; at its conclusion he was old enough to take his seat in Parliament.
It is not clear exactly when he entered the Commons, but as his twenty-first birthday was not reached until almost the end of the 1791 session, it is possible that he waited until the following year.

With the help of his father's influence and his political talent, he rose relatively fast in the Tory government.
In February 1792, he gave the reply to Samuel Whitbread's critical motion on the government's Russian policy.
He delivered several other speeches during the session, including one against the abolition of the slave trade, which reflected his father's strong opposition to William Wilberforce's campaign.
He served as a member of the Board of Control for India from 1793 to 1796.

In the defence movement that followed the outbreak of hostilities with France, Jenkinson, was one of the first of the ministers of the government to enlist in the militia.
He became a Colonel in the Cinque Ports Fencibles in 1794, and his military duties led to frequent absences from the Commons.
His regiment was sent to Scotland in 1796, and he was quartered for a time in Dumfries.
Jenkinson was baptised on 29 June 1770 at St. Margaret's, Westminster, the son of George III's close adviser Charles Jenkinson, later the first Earl of Liverpool, and his first wife, Amelia Watts. Jenkinson's 19-year-old mother, who was the daughter of a senior East India Company official, William Watts, and of his wife Begum Johnson, died from the effects of childbirth one month after his birth. Through his mother's ancestry, Jenkinson was also one-eighth Indian.
Jenkinson was educated at Charterhouse School and Christ Church, Oxford. In the summer of 1789, Jenkinson spent four months in Paris to perfect his French and enlarge his social experience. He returned to Oxford for three months to complete his terms of residence, and in May 1790 was created Master of Arts.
He won election to the House of Commons in 1790 for Rye, a seat he would hold until 1803; at the time, however, he was below the age of assent to Parliament, so he refrained from taking his seat and spent the following winter and early spring in an extended tour of the continent. This tour took in the Netherlands and Italy; at its conclusion he was old enough to take his seat in Parliament. It is not clear exactly when he entered the Commons, but as his twenty-first birthday was not reached until almost the end of the 1791 session, it is possible that he waited until the following year.
With the help of his father's influence and his political talent, he rose relatively fast in the Tory government. In February 1792, he gave the reply to Samuel Whitbread's critical motion on the government's Russian policy. He delivered several other speeches during the session, including one against the abolition of the slave trade, which reflected his father's strong opposition to William Wilberforce's campaign. He served as a member of the Board of Control for India from 1793 to 1796.
In the defence movement that followed the outbreak of hostilities with France, Jenkinson, was one of the first of the ministers of the government to enlist in the militia. He became a Colonel in the Cinque Ports Fencibles in 1794, and his military duties led to frequent absences from the Commons. His regiment was sent to Scotland in 1796, and he was quartered for a time in Dumfries.
Robert Jenkinson, 2nd Earl of Liverpool