The Queen is undoubtedly rich but there are 14 other aristocrats whose wealth, estates, and assets dwarfs hers.

The Queen is the 15th richest aristocrat in Britain and actually only the joint 319th wealthiest person in the UK – alongside music mogul Simon Cowell, according to the Sunday Times Rich List for 2016.

Her fortune is valued at £340 million ($418 million). She gets 15% of the profits from the Crown Estate property portfolio as well as an allowance derived from taxpayer money. She also has an extensive collection of valuable assets, such as art, jewellery, and cars.

But there are several aristocrats that have billions of more pounds than her.

Check out who made the list:

(All the ages of the people who made the list correspond to the time their fortunes were calculated, which was as of April 24, this year. Since the data was released, the Duke of Westminster died and so the information has been updated to reflect his heir's claim to his wealth):

14. The Duke of Northumberland

Foto: Melissa Percy arrives with her father, the Duke of Northumberland, for her wedding to Thomas Straubenzee in 2013. source PA

Net worth: £365 million

Age: 59

The Duke (pictured here with his daughter on her wedding day) owes his wealth to inheriting assets, such as Alnwick Castle which has been in the family for more than 700 years. He also has an extensive estates portfolio, including 120,000 acres in Northumberland.

13. Charlotte Townshend

Foto: The Prince of Wales greets Charlotte Townshend in 2006. source PA

Net worth: £425 million

Age: 61

Townshend is the only other person, other than the Queen, to be allowed to own swans. Her wealth mainly comes from estate companies and farming. Some of the most lucrative estates she owns is 20 acres of land around the affluent Holland Park area in London.

12. The Duke of Sutherland

Foto: Winston Churchill and the current Duke of Sutherland's ancestor (R) on the beach in 1927. source PA

Net worth: £580 million

Age: 76

Francis Ronald Egerton is the 7th Duke of Sutherland and most of his wealth comes from his art collection and owning 12,000 acres in the Scottish Borders and East Anglia.

11. Lord Rothschild

Foto: Lord Jacob Rothschild arrives at St Bride's Church in London for a ceremony to celebrate the wedding of Rupert Murdoch and Jerry Hall. source PA

Net worth: £650 million

Age: 80

Rothschild chairs RIT Capital Partners, which he built into a £2.57 billion company, after departing from the family bank. He also retains vast amounts of land surrounding Waddesdon Manor estate in Buckinghamshire before it was given to the National Trust in 1957. His personal wine collection of 15,000 bottles dates as far back as 1870.

10. Duke of Bedford

Foto: source Bloomsbury Estates

Net worth: £685 million

Age: 54

Andrew Ian Henry Russell is the 15th Duke of Bedford and is heir to two family companies as well as house and grounds valued at £150 million. His art collection is extensive and the 24 Canalettos, paintings by artist Giovanni Antonio Canal, are worth £450 million alone. However, like most aristocrats, he makes a lot of money off lucrative estates in London, such as 180 buildings in the affluent Bloomsbury.

9. Prince Jonathan and Princess Gesine Doria Pamphilj

Foto: source YouTube/lafugadicaravaggio

Net worth: £750 million

Age: 72

British orphans, Prince Jonathan and Princess Gesine (pictured), were adopted by Royal Navy officer Frank Pogson and London-born Princess Orietta Doria-Pamphilj - from an Italian noble family. Their inheritance accounts for all their wealth as they own a palace in Genoa, an art collection and the Palazzo Doria Pamphilj in Rome.

8. The Earl of Iveagh and the Guinness family

Foto: New born baby Arthur Edward Rory Guinness with parents Lord Iveagh (Arthur Francis Benjamin Guinness) and Lady Iveagh (Miranda Guinness) after his birth on August the 10th 1969. source PA

Net worth: £854 million

Age: 46

Ned Guinness, a descendant of Arthur who invented the drink in 1759, sold the family mansion in Farmleigh, Dublin's Phoenix Park, which he grew up in 1999. But his vast wealth landed on him after he became 4th Earl of Iveagh in 1992 as he inherited £62 million in Guinness shares. He and his family stake's in Diageo, which owns Guinness, is worth £200 million.

7. The Duke of Devonshire

Foto: The Duke and Duchess and Devonshire. source PA

Net worth: £870 million

Age: 72

Like most of the aristocrats on this list, the Duke of Devonshire's wealth comes from owning large amounts of estate, such as Chatsworth House in Derbyshire and a 30,000-acre Yorkshire estate. He also has an art collection worth £900 million.

6. Viscount Rothermere and family

Foto: Viscount Rothermere. source Reuters

Net worth: £1 billion

Age: 48

Jonathan Harmsworth, the Viscount, took control over the Daily Mail & General Trust in 1998 when his father died. The family stake is worth £710 million and the rest of his wealth derives from dividends and property in London and the southwest of England.

5. Robert Miller and Princess Marie-Chantal and family

Foto: Crown Princess Marie-Chantal of Greece, daughter of Robert Miller. source Getty

Net worth: £1.58 billion

Age: 82

Crown Princess Marie-Chantal is rich because her father Robert Miller made his fortune through cofounding the Hong Kong-based Duty Free Shoppers chain in 1960. She then married Pavlos, the son of former King Constantine II of Greece, who was deposed in 1973.

4. Viscount Portman and family

Foto: source Portman Estates

Net worth: £1.89 billion

Age: 57

Christopher Edward Berkeley Portman, the 10th Viscount Portman, owns an estate which includes 110 acres of land in central London, which gives him and his family huge amounts of wealth. On the estate, the group let out residential properties across some of the most affluent areas in London, including shops in Baker Street.

3. Baroness Howard de Walden

Foto: source Wiki Commons

Net worth: £3.63 billion

Age: 80

The Baroness, eldest of four daughters of the late Lord Howard de Walden, increased the family's fortune by £400 million in 2014 to 2015, mainly due to their control of 90 acres of central London land.

2. Earl Cadogan

Foto: The Right Honourable the Earl Cadogan from London is knighted by Queen Elizabeth II at Buckingham Palace. source PA

Net worth: £5.7 billion

Age: 79

Charles Gerald John Cadogan cultivated a massive fortune through the property company Cadogan Group. In 2014, the group bought almost 200 properties. He's been a huge beneficiary of the London property-price boom as the Cadogan Group owns 93 acres in Chelsea - one of the capital's prime locations.

Im 2015, net assets at the Cadogan Grouprose to £5.2 billion ($7.48 billion), says The Sunday Times.

1. Hugh Grosvenor, son of the recently deceased Duke of Westminster

Foto: The 7th Duke of Westminster, Hugh Grosvenor, arriving for a memorial service to celebrate the life of his father, the sixth Duke of Westminster at Chester Cathedral, Chester. source PA

Net worth: £9.35 billion

Age: Gerald Grosvenor, 64 (at the time of the ranking calculation). Hugh Grosvenor, 25.

When the ranking was initially calculated in April this year, the Sixth Duke of Westminster, Gerald Cavendish Grosvenor was near the top of the list. He made most of his money from inherited land that dates back to 1677. He owned the Grosvenor family estate, which has 300 acres across west London, including in wealthy areas like Belgravia and Mayfair. His property-development pipeline was also at £5.5 billion ($7.92 billion) as of the end of 2015.

However, in light of his death, his son Hugh Grosvenor (pictured) is set to inherit his estate.