1000s may refer to:
- The millennium from 1 January 1000, to 31 December 1999, almost synonymous with the 2nd millennium (1001–2000)
- The century from 1 January 1000, to 31 December 1099, almost synonymous with the 11th century (1001–1100)
- 1000s (decade), the decade from 1 January 1000, to 31 December 1009, almost synonymous with the 101st decade (1001–1010)
See also
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