The 1120s was a decade that began on 1 January 1120, and ended on 31 December 1129. It is distinct from the decade known as the 113th decade which began on January 1, 1121. and ended on December 31, 1130.

Millennium: 2nd millennium
Centuries: 11th century12th century13th century
Decades: 1090s 1100s 1110s1120s1130s 1140s 1150s
Years: 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129
Categories: BirthsDeathsArchitecture
EstablishmentsDisestablishments
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