Category:1921 in the United Kingdom

• 1921 in England (5 C, 24 P)
• 1921 in Ireland (11 C, 26 P)
• 1921 in Northern Ireland (4 C, 3 P)
• 1921 in Scotland (3 C, 8 P)
• 1921 in Wales (3 C, 6 P)

-

• 1921 in the British Empire (25 C, 3 P)
• 1921 in the Crown Dependencies (2 C)

/

• 1921 disestablishments in the United Kingdom (5 C, 16 P)
• 1921 establishments in the United Kingdom (8 C, 43 P)

C

• 1921 crimes in the United Kingdom (1 C, 1 P)

D

• 1921 disasters in the United Kingdom (3 P)

L

• 1921 in British law (3 C, 7 P)

N

• 1921 British novels (23 P)

P

• 1921 in British politics (2 C, 1 P)

S

• 1921 in British sport (9 C, 3 P)

• 1921 in the United Kingdom
• 1921 in Ireland
• 1921 in Wales

*

• 1921 in Northern Ireland

A

• Agreement Between Great Britain and Denmark Relating to the Suppression of the Capitulations in Egypt
• Agreement Between Great Britain and Norway Relating to the Suppression of the Capitulations in Egypt
• Agreement Between Great Britain and Sweden Relating to the Suppression of the Capitulations in Egypt (1921)
• Anglo-Irish Treaty
• Anglo-Soviet Trade Agreement

B

• 1921 Birthday Honours
• Black Friday (1921)

C

• 1921 United Kingdom census

D

• Depression of 1920–1921

F

• List of British films of 1921
• Four-Power Treaty

G

• Geddes Axe

L

• List of fellows of the Royal Society elected in 1921
• Conference of London of 1921–1922

M

• 1921 in British music

N

• 1921 New Year Honours

R

• 1921 in British radio

S

• 1921 in Scotland
• Sempill Mission
• Shackleton–Rowett Expedition