Category:1820 in the United Kingdom

• 1820 in England (2 C, 3 P)
• 1820 in Ireland (1 C, 1 P)
• 1820 in Scotland (1 C, 8 P)
• 1820 in Wales (1 P)

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• 1820 in the British Empire (11 C)

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• 1820 disestablishments in the United Kingdom (3 C)
• 1820 establishments in the United Kingdom (5 C, 5 P)

C

• 1820 crimes in the United Kingdom (6 P)

E

• 1820 elections in the United Kingdom (2 P)

L

• 1820 in British law (2 C, 2 P)

N

• 1820 British novels (5 P)

• 1820 in the United Kingdom
• 1820 in Ireland

C

• Cato Street Conspiracy

F

• List of fellows of the Royal Society elected in 1820

G

• 1820 United Kingdom general election
• List of MPs elected in the 1820 United Kingdom general election

L

• List of MPs elected in the 1818 United Kingdom general election

R

• Regency era

S

• 1820 in Scotland

W

• 1820 in Wales